diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index fd5acd0cf83e1..f3c9c5d11cdf6 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -4281,11 +4281,11 @@
         "category": "Error",
         "code": 5098
     },
-    "Flag '{0}' is deprecated and will stop functioning in TypeScript {1}. Specify compilerOption '\"ignoreDeprecations\": \"{2}\"' to silence this error.": {
+    "Option '{0}' is deprecated and will stop functioning in TypeScript {1}. Specify compilerOption '\"ignoreDeprecations\": \"{2}\"' to silence this error.": {
         "category": "Error",
         "code": 5101
     },
-    "Flag '{0}' is deprecated. Please remove it from your configuration.": {
+    "Option '{0}' has been removed. Please remove it from your configuration.": {
         "category": "Error",
         "code": 5102
     },
@@ -4305,6 +4305,14 @@
         "category": "Message",
         "code": 5106
     },
+    "Option '{0}={1}' is deprecated and will stop functioning in TypeScript {2}. Specify compilerOption '\"ignoreDeprecations\": \"{3}\"' to silence this error.": {
+        "category": "Error",
+        "code": 5107
+    },
+    "Option '{0}={1}' has been removed. Please remove it from your configuration.": {
+        "category": "Error",
+        "code": 5108
+    },
 
     "Generates a sourcemap for each corresponding '.d.ts' file.": {
         "category": "Message",
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index d2c13278596dc..219c87614ccf0 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -56,7 +56,6 @@ import {
     CustomTransformers,
     Debug,
     DeclarationWithTypeParameterChildren,
-    DeprecationVersion,
     Diagnostic,
     DiagnosticCategory,
     diagnosticCategoryName,
@@ -318,6 +317,7 @@ import {
     UnparsedSource,
     VariableDeclaration,
     VariableStatement,
+    Version,
     versionMajorMinor,
     walkUpParenthesizedExpressions,
     WriteFileCallback,
@@ -1445,6 +1445,8 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
     const { rootNames, options, configFileParsingDiagnostics, projectReferences, typeScriptVersion } = createProgramOptions;
     let { oldProgram } = createProgramOptions;
 
+    const reportInvalidIgnoreDeprecations = memoize(() => createOptionValueDiagnostic("ignoreDeprecations", Diagnostics.Invalid_value_for_ignoreDeprecations));
+
     let processingDefaultLibFiles: SourceFile[] | undefined;
     let processingOtherFiles: SourceFile[] | undefined;
     let files: SourceFile[];
@@ -4320,97 +4322,112 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
         }
     }
 
-    function getVersionForDeprecationDiagnostics(reportInvalidIgnoreDeprecations: boolean) {
-        const version = typeScriptVersion || versionMajorMinor;
+    function getIgnoreDeprecationsVersion(): Version {
         const ignoreDeprecations = options.ignoreDeprecations;
         if (ignoreDeprecations) {
-            if (ignoreDeprecations === DeprecationVersion.v5_0 && version.startsWith("5.")) {
-                return;
-            }
-            else if (reportInvalidIgnoreDeprecations) {
-                createOptionValueDiagnostic("ignoreDeprecations", Diagnostics.Invalid_value_for_ignoreDeprecations);
+            // While we could do Version.tryParse here to support any version,
+            // for now, only allow "5.0". We aren't planning on deprecating anything
+            // until 6.0.
+            if (ignoreDeprecations === "5.0") {
+                return new Version(ignoreDeprecations);
             }
+            reportInvalidIgnoreDeprecations();
         }
-        return version;
+        return Version.zero;
     }
 
-    function verifyDeprecatedCompilerOptions() {
-        const version = getVersionForDeprecationDiagnostics(/*reportInvalidIgnoreDeprecations*/ true);
-        if (!version) return;
-        if (options.target === ScriptTarget.ES3) {
-            createDeprecatedDiagnosticForOption(version, "target", "ES3");
-        }
-        if (options.noImplicitUseStrict) {
-            createDeprecatedDiagnosticForOption(version, "noImplicitUseStrict");
-        }
-        if (options.keyofStringsOnly) {
-            createDeprecatedDiagnosticForOption(version, "keyofStringsOnly");
-        }
-        if (options.suppressExcessPropertyErrors) {
-            createDeprecatedDiagnosticForOption(version, "suppressExcessPropertyErrors");
-        }
-        if (options.suppressImplicitAnyIndexErrors) {
-            createDeprecatedDiagnosticForOption(version, "suppressImplicitAnyIndexErrors");
-        }
-        if (options.noStrictGenericChecks) {
-            createDeprecatedDiagnosticForOption(version, "noStrictGenericChecks");
-        }
-        if (options.charset) {
-            createDeprecatedDiagnosticForOption(version, "charset");
-        }
-        if (options.out) {
-            createDeprecatedDiagnosticForOption(version, "out");
-        }
-        if (options.importsNotUsedAsValues) {
-            createDeprecatedDiagnosticForOption(version, "importsNotUsedAsValues", /*value*/ undefined, "verbatimModuleSyntax");
-        }
-        if (options.preserveValueImports) {
-            createDeprecatedDiagnosticForOption(version, "preserveValueImports", /*value*/ undefined, "verbatimModuleSyntax");
+    function checkDeprecations(
+        deprecatedIn: string,
+        removedIn: string,
+        createDiagnostic: (name: string, value: string | undefined, useInstead: string | undefined, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number) => void,
+        fn: (createDeprecatedDiagnostic: (name: string, value?: string, useInstead?: string) => void) => void,
+    ) {
+        const deprecatedInVersion = new Version(deprecatedIn);
+        const removedInVersion = new Version(removedIn);
+        const typescriptVersion = new Version(typeScriptVersion || versionMajorMinor);
+        const ignoreDeprecationsVersion = getIgnoreDeprecationsVersion();
+
+        const mustBeRemoved = !(removedInVersion.compareTo(typescriptVersion) === Comparison.GreaterThan);
+        const canBeSilenced = !mustBeRemoved && ignoreDeprecationsVersion.compareTo(deprecatedInVersion) === Comparison.LessThan;
+
+        if (mustBeRemoved || canBeSilenced) {
+            fn((name, value, useInstead) => {
+                if (mustBeRemoved) {
+                    if (value === undefined) {
+                        createDiagnostic(name, value, useInstead, Diagnostics.Option_0_has_been_removed_Please_remove_it_from_your_configuration, name);
+                    }
+                    else {
+                        createDiagnostic(name, value, useInstead, Diagnostics.Option_0_1_has_been_removed_Please_remove_it_from_your_configuration, name, value);
+                    }
+                }
+                else {
+                    if (value === undefined) {
+                        createDiagnostic(name, value, useInstead, Diagnostics.Option_0_is_deprecated_and_will_stop_functioning_in_TypeScript_1_Specify_compilerOption_ignoreDeprecations_Colon_2_to_silence_this_error, name, removedIn, deprecatedIn);
+                    }
+                    else {
+                        createDiagnostic(name, value, useInstead, Diagnostics.Option_0_1_is_deprecated_and_will_stop_functioning_in_TypeScript_2_Specify_compilerOption_ignoreDeprecations_Colon_3_to_silence_this_error, name, value, removedIn, deprecatedIn);
+                    }
+                }
+            });
         }
     }
 
-    function verifyDeprecatedProjectReference(ref: ProjectReference, parentFile: JsonSourceFile | undefined, index: number) {
-        if (ref.prepend) {
-            const version = getVersionForDeprecationDiagnostics(/*reportInvalidIgnoreDeprecations*/ false);
-            if (version) {
-                createDeprecatedOptionForVersionDiagnostic(
-                    version,
-                    (message, arg0, arg1, arg2) => createDiagnosticForReference(parentFile, index, message, arg0, arg1, arg2),
-                    "prepend",
-                );
+    function verifyDeprecatedCompilerOptions() {
+        function createDiagnostic(name: string, value: string | undefined, useInstead: string | undefined, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number) {
+            if (useInstead) {
+                const details = chainDiagnosticMessages(/*details*/ undefined, Diagnostics.Use_0_instead, useInstead);
+                const chain = chainDiagnosticMessages(details, message, arg0, arg1, arg2, arg3);
+                createDiagnosticForOption(/*onKey*/ !value, name, /*option2*/ undefined, chain);
+            }
+            else {
+                createDiagnosticForOption(/*onKey*/ !value, name, /*option2*/ undefined, message, arg0, arg1, arg2, arg3);
             }
         }
-    }
 
-    function createDeprecatedDiagnosticForOption(version: string, name: string, value?: string, useInstead?: string) {
-        return createDeprecatedOptionForVersionDiagnostic(
-            version,
-            (message, arg0, arg1, arg2) => {
-                if (useInstead) {
-                    const details = chainDiagnosticMessages(/*details*/ undefined, Diagnostics.Use_0_instead, useInstead);
-                    const chain = chainDiagnosticMessages(details, message, arg0, arg1, arg2);
-                    createDiagnosticForOption(/*onKey*/ !value, name, /*option2*/ undefined, chain);
-                }
-                else {
-                    createDiagnosticForOption(/*onKey*/ !value, name, /*option2*/ undefined, message, arg0, arg1, arg2);
-                }
-            },
-            name,
-            value,
-        );
+        checkDeprecations("5.0", "5.5", createDiagnostic, createDeprecatedDiagnostic => {
+            if (options.target === ScriptTarget.ES3) {
+                createDeprecatedDiagnostic("target", "ES3");
+            }
+            if (options.noImplicitUseStrict) {
+                createDeprecatedDiagnostic("noImplicitUseStrict");
+            }
+            if (options.keyofStringsOnly) {
+                createDeprecatedDiagnostic("keyofStringsOnly");
+            }
+            if (options.suppressExcessPropertyErrors) {
+                createDeprecatedDiagnostic("suppressExcessPropertyErrors");
+            }
+            if (options.suppressImplicitAnyIndexErrors) {
+                createDeprecatedDiagnostic("suppressImplicitAnyIndexErrors");
+            }
+            if (options.noStrictGenericChecks) {
+                createDeprecatedDiagnostic("noStrictGenericChecks");
+            }
+            if (options.charset) {
+                createDeprecatedDiagnostic("charset");
+            }
+            if (options.out) {
+                createDeprecatedDiagnostic("out", /*value*/ undefined, "outFile");
+            }
+            if (options.importsNotUsedAsValues) {
+                createDeprecatedDiagnostic("importsNotUsedAsValues", /*value*/ undefined, "verbatimModuleSyntax");
+            }
+            if (options.preserveValueImports) {
+                createDeprecatedDiagnostic("preserveValueImports", /*value*/ undefined, "verbatimModuleSyntax");
+            }
+        });
     }
 
-    function createDeprecatedOptionForVersionDiagnostic(
-        version: string,
-        createDiagnostic: (message: DiagnosticMessage, arg0: string, arg1?: string, arg2?: string) => void,
-        name: string,
-        value?: string) {
-        if (version === DeprecationVersion.v6_0) {
-            createDiagnostic(Diagnostics.Flag_0_is_deprecated_Please_remove_it_from_your_configuration, value || name);
-        }
-        else {
-            createDiagnostic(Diagnostics.Flag_0_is_deprecated_and_will_stop_functioning_in_TypeScript_1_Specify_compilerOption_ignoreDeprecations_Colon_2_to_silence_this_error, value || name, DeprecationVersion.v5_5, DeprecationVersion.v5_0);
+    function verifyDeprecatedProjectReference(ref: ProjectReference, parentFile: JsonSourceFile | undefined, index: number) {
+        function createDiagnostic(_name: string, _value: string | undefined, _useInstead: string | undefined, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number) {
+            createDiagnosticForReference(parentFile, index, message, arg0, arg1, arg2, arg3);
         }
+
+        checkDeprecations("5.0", "5.5", createDiagnostic, createDeprecatedDiagnostic => {
+            if (ref.prepend) {
+                createDeprecatedDiagnostic("prepend");
+            }
+        });
     }
 
     function createDiagnosticExplainingFile(file: SourceFile | undefined, fileProcessingReason: FileIncludeReason | undefined, diagnostic: DiagnosticMessage, args: (string | number | undefined)[] | undefined): Diagnostic {
@@ -4648,23 +4665,23 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
         createDiagnosticForOption(/*onKey*/ false, option1, /*option2*/ undefined, message, arg0, arg1);
     }
 
-    function createDiagnosticForReference(sourceFile: JsonSourceFile | undefined, index: number, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number) {
+    function createDiagnosticForReference(sourceFile: JsonSourceFile | undefined, index: number, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number) {
         const referencesSyntax = firstDefined(getTsConfigPropArray(sourceFile || options.configFile, "references"),
             property => isArrayLiteralExpression(property.initializer) ? property.initializer : undefined);
         if (referencesSyntax && referencesSyntax.elements.length > index) {
-            programDiagnostics.add(createDiagnosticForNodeInSourceFile(sourceFile || options.configFile!, referencesSyntax.elements[index], message, arg0, arg1, arg2));
+            programDiagnostics.add(createDiagnosticForNodeInSourceFile(sourceFile || options.configFile!, referencesSyntax.elements[index], message, arg0, arg1, arg2, arg3));
         }
         else {
-            programDiagnostics.add(createCompilerDiagnostic(message, arg0, arg1, arg2));
+            programDiagnostics.add(createCompilerDiagnostic(message, arg0, arg1, arg2, arg3));
         }
     }
 
     function createDiagnosticForOption(onKey: boolean, option1: string, option2: string | undefined, message: DiagnosticMessageChain): void;
-    function createDiagnosticForOption(onKey: boolean, option1: string, option2: string | undefined, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): void;
-    function createDiagnosticForOption(onKey: boolean, option1: string, option2: string | undefined, message: DiagnosticMessage | DiagnosticMessageChain, arg0?: string | number, arg1?: string | number, arg2?: string | number): void {
+    function createDiagnosticForOption(onKey: boolean, option1: string, option2: string | undefined, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): void;
+    function createDiagnosticForOption(onKey: boolean, option1: string, option2: string | undefined, message: DiagnosticMessage | DiagnosticMessageChain, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): void {
         const compilerOptionsObjectLiteralSyntax = getCompilerOptionsObjectLiteralSyntax();
         const needCompilerDiagnostic = !compilerOptionsObjectLiteralSyntax ||
-            !createOptionDiagnosticInObjectLiteralSyntax(compilerOptionsObjectLiteralSyntax, onKey, option1, option2, message, arg0, arg1, arg2);
+            !createOptionDiagnosticInObjectLiteralSyntax(compilerOptionsObjectLiteralSyntax, onKey, option1, option2, message, arg0, arg1, arg2, arg3);
 
         if (needCompilerDiagnostic) {
             // eslint-disable-next-line local/no-in-operator
@@ -4672,7 +4689,7 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
                 programDiagnostics.add(createCompilerDiagnosticFromMessageChain(message));
             }
             else {
-                programDiagnostics.add(createCompilerDiagnostic(message, arg0, arg1, arg2));
+                programDiagnostics.add(createCompilerDiagnostic(message, arg0, arg1, arg2, arg3));
             }
         }
     }
@@ -4694,9 +4711,9 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
     }
 
     function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral: ObjectLiteralExpression, onKey: boolean, key1: string, key2: string | undefined, messageChain: DiagnosticMessageChain): boolean;
-    function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral: ObjectLiteralExpression, onKey: boolean, key1: string, key2: string | undefined, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number): boolean;
-    function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral: ObjectLiteralExpression, onKey: boolean, key1: string, key2: string | undefined, message: DiagnosticMessage | DiagnosticMessageChain, arg0?: string | number, arg1?: string | number, arg2?: string | number): boolean;
-    function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral: ObjectLiteralExpression, onKey: boolean, key1: string, key2: string | undefined, message: DiagnosticMessage | DiagnosticMessageChain, arg0?: string | number, arg1?: string | number, arg2?: string | number): boolean {
+    function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral: ObjectLiteralExpression, onKey: boolean, key1: string, key2: string | undefined, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): boolean;
+    function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral: ObjectLiteralExpression, onKey: boolean, key1: string, key2: string | undefined, message: DiagnosticMessage | DiagnosticMessageChain, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): boolean;
+    function createOptionDiagnosticInObjectLiteralSyntax(objectLiteral: ObjectLiteralExpression, onKey: boolean, key1: string, key2: string | undefined, message: DiagnosticMessage | DiagnosticMessageChain, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): boolean {
         const props = getPropertyAssignment(objectLiteral, key1, key2);
         for (const prop of props) {
             // eslint-disable-next-line local/no-in-operator
@@ -4704,7 +4721,7 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
                 programDiagnostics.add(createDiagnosticForNodeFromMessageChain(options.configFile!, onKey ? prop.name : prop.initializer, message));
             }
             else {
-                programDiagnostics.add(createDiagnosticForNodeInSourceFile(options.configFile!, onKey ? prop.name : prop.initializer, message, arg0, arg1, arg2));
+                programDiagnostics.add(createDiagnosticForNodeInSourceFile(options.configFile!, onKey ? prop.name : prop.initializer, message, arg0, arg1, arg2, arg3));
             }
         }
         return !!props.length;
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index a98d25422e516..4d60dc8f73594 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -9899,12 +9899,3 @@ export interface Queue<T> {
     dequeue(): T;
     isEmpty(): boolean;
 }
-
-/** @internal */
-export const enum DeprecationVersion {
-    /* eslint-disable @typescript-eslint/naming-convention */
-    v5_0 = "5.0",
-    v5_5 = "5.5",
-    v6_0 = "6.0",
-    /* eslint-enable @typescript-eslint/naming-convention */
-}
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck1.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck1.errors.txt
index 4e17fb8093d0b..520392a911da5 100644
--- a/tests/baselines/reference/ES3For-ofTypeCheck1.errors.txt
+++ b/tests/baselines/reference/ES3For-ofTypeCheck1.errors.txt
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck1.ts(1,15): error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck1.ts (1 errors) ====
     for (var v of "") { }
                   ~~
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck2.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck2.errors.txt
index 7520be7645117..a97ae3abfb267 100644
--- a/tests/baselines/reference/ES3For-ofTypeCheck2.errors.txt
+++ b/tests/baselines/reference/ES3For-ofTypeCheck2.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck2.ts (0 errors) ====
     for (var v of [true]) { }
\ No newline at end of file
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck4.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck4.errors.txt
index fa2927aa454be..388e7db13c87b 100644
--- a/tests/baselines/reference/ES3For-ofTypeCheck4.errors.txt
+++ b/tests/baselines/reference/ES3For-ofTypeCheck4.errors.txt
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck4.ts(2,17): error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck4.ts (1 errors) ====
     var union: string | string[];
     for (const v of union) { }
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck6.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck6.errors.txt
index a3c1eac9be535..148ef044ff129 100644
--- a/tests/baselines/reference/ES3For-ofTypeCheck6.errors.txt
+++ b/tests/baselines/reference/ES3For-ofTypeCheck6.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck6.ts (0 errors) ====
     var union: string[] | number[];
     for (var v of union) { }
\ No newline at end of file
diff --git a/tests/baselines/reference/accessorWithES3.errors.txt b/tests/baselines/reference/accessorWithES3.errors.txt
index 0418b7b8df110..0d0a482c20983 100644
--- a/tests/baselines/reference/accessorWithES3.errors.txt
+++ b/tests/baselines/reference/accessorWithES3.errors.txt
@@ -1,11 +1,11 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts(4,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts(10,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts(15,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts(19,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts (4 errors) ====
     // error to use accessors in ES3 mode
     
diff --git a/tests/baselines/reference/accessorsNotAllowedInES3.errors.txt b/tests/baselines/reference/accessorsNotAllowedInES3.errors.txt
index 4e28bc616bd78..e482b16103e8a 100644
--- a/tests/baselines/reference/accessorsNotAllowedInES3.errors.txt
+++ b/tests/baselines/reference/accessorsNotAllowedInES3.errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/compiler/accessorsNotAllowedInES3.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/accessorsNotAllowedInES3.ts(4,15): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/accessorsNotAllowedInES3.ts (2 errors) ====
     class C {
         get x(): number { return 1; }
diff --git a/tests/baselines/reference/alwaysStrictNoImplicitUseStrict.errors.txt b/tests/baselines/reference/alwaysStrictNoImplicitUseStrict.errors.txt
index d28c5fa62f5f5..75df661fc9715 100644
--- a/tests/baselines/reference/alwaysStrictNoImplicitUseStrict.errors.txt
+++ b/tests/baselines/reference/alwaysStrictNoImplicitUseStrict.errors.txt
@@ -1,10 +1,10 @@
 error TS5053: Option 'noImplicitUseStrict' cannot be specified with option 'alwaysStrict'.
-error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/compiler/alwaysStrictNoImplicitUseStrict.ts(3,13): error TS1100: Invalid use of 'arguments' in strict mode.
 
 
 !!! error TS5053: Option 'noImplicitUseStrict' cannot be specified with option 'alwaysStrict'.
-!!! error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/alwaysStrictNoImplicitUseStrict.ts (1 errors) ====
     module M {
         export function f() {
diff --git a/tests/baselines/reference/ambientAccessors(target=es3).errors.txt b/tests/baselines/reference/ambientAccessors(target=es3).errors.txt
index 8be0f71e5438e..8e365237fd925 100644
--- a/tests/baselines/reference/ambientAccessors(target=es3).errors.txt
+++ b/tests/baselines/reference/ambientAccessors(target=es3).errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/ambientAccessors.ts (0 errors) ====
     // ok to use accessors in ambient class in ES3
     declare class C {
diff --git a/tests/baselines/reference/amdDeclarationEmitNoExtraDeclare.errors.txt b/tests/baselines/reference/amdDeclarationEmitNoExtraDeclare.errors.txt
index a99f63a88ba78..e79d8d4d56ef6 100644
--- a/tests/baselines/reference/amdDeclarationEmitNoExtraDeclare.errors.txt
+++ b/tests/baselines/reference/amdDeclarationEmitNoExtraDeclare.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/Class.ts (0 errors) ====
     import { Configurable } from "./Configurable"
     
diff --git a/tests/baselines/reference/bigIntWithTargetES3.errors.txt b/tests/baselines/reference/bigIntWithTargetES3.errors.txt
index b8ab2617649d9..0c2b1793eb9ba 100644
--- a/tests/baselines/reference/bigIntWithTargetES3.errors.txt
+++ b/tests/baselines/reference/bigIntWithTargetES3.errors.txt
@@ -1,11 +1,11 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/compiler/bigIntWithTargetES3.ts(5,22): error TS2737: BigInt literals are not available when targeting lower than ES2020.
 tests/cases/compiler/bigIntWithTargetES3.ts(5,29): error TS2737: BigInt literals are not available when targeting lower than ES2020.
 tests/cases/compiler/bigIntWithTargetES3.ts(5,39): error TS2737: BigInt literals are not available when targeting lower than ES2020.
 tests/cases/compiler/bigIntWithTargetES3.ts(5,48): error TS2737: BigInt literals are not available when targeting lower than ES2020.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/bigIntWithTargetES3.ts (4 errors) ====
     const normalNumber = 123; // should not error
     let bigintType: bigint; // should not error
diff --git a/tests/baselines/reference/checkIndexConstraintOfJavascriptClassExpression.errors.txt b/tests/baselines/reference/checkIndexConstraintOfJavascriptClassExpression.errors.txt
index 015a6ec607084..c62df130f972a 100644
--- a/tests/baselines/reference/checkIndexConstraintOfJavascriptClassExpression.errors.txt
+++ b/tests/baselines/reference/checkIndexConstraintOfJavascriptClassExpression.errors.txt
@@ -1,10 +1,12 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/weird.js(1,1): error TS2552: Cannot find name 'someFunction'. Did you mean 'Function'?
 tests/cases/compiler/weird.js(1,23): error TS7006: Parameter 'BaseClass' implicitly has an 'any' type.
 tests/cases/compiler/weird.js(9,17): error TS7006: Parameter 'error' implicitly has an 'any' type.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/weird.js (3 errors) ====
     someFunction(function(BaseClass) {
     ~~~~~~~~~~~~
diff --git a/tests/baselines/reference/checkJsdocReturnTag1.errors.txt b/tests/baselines/reference/checkJsdocReturnTag1.errors.txt
index 2e0c41faeec44..69a8247b72191 100644
--- a/tests/baselines/reference/checkJsdocReturnTag1.errors.txt
+++ b/tests/baselines/reference/checkJsdocReturnTag1.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/jsdoc/returns.js (0 errors) ====
     // @ts-check
     /**
diff --git a/tests/baselines/reference/checkJsdocReturnTag2.errors.txt b/tests/baselines/reference/checkJsdocReturnTag2.errors.txt
index 31af6d7c2fb5a..3d4ed2903ef27 100644
--- a/tests/baselines/reference/checkJsdocReturnTag2.errors.txt
+++ b/tests/baselines/reference/checkJsdocReturnTag2.errors.txt
@@ -1,10 +1,12 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/conformance/jsdoc/returns.js(6,5): error TS2322: Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/jsdoc/returns.js(13,5): error TS2322: Type 'number | boolean' is not assignable to type 'string | number'.
   Type 'boolean' is not assignable to type 'string | number'.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/jsdoc/returns.js (2 errors) ====
     // @ts-check
     /**
diff --git a/tests/baselines/reference/compilerOptionsOutAndNoEmit.errors.txt b/tests/baselines/reference/compilerOptionsOutAndNoEmit.errors.txt
index 0662a6a18f0d6..d273318f4b432 100644
--- a/tests/baselines/reference/compilerOptionsOutAndNoEmit.errors.txt
+++ b/tests/baselines/reference/compilerOptionsOutAndNoEmit.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     class c {
     }
diff --git a/tests/baselines/reference/computedPropertyNames52(target=es2015).errors.txt b/tests/baselines/reference/computedPropertyNames52(target=es2015).errors.txt
index f703c20b1fa6d..a20182981d231 100644
--- a/tests/baselines/reference/computedPropertyNames52(target=es2015).errors.txt
+++ b/tests/baselines/reference/computedPropertyNames52(target=es2015).errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/es6/computedProperties/computedPropertyNames52.js (0 errors) ====
     const array = [];
     for (let i = 0; i < 10; ++i) {
diff --git a/tests/baselines/reference/computedPropertyNames52(target=es5).errors.txt b/tests/baselines/reference/computedPropertyNames52(target=es5).errors.txt
index f703c20b1fa6d..a20182981d231 100644
--- a/tests/baselines/reference/computedPropertyNames52(target=es5).errors.txt
+++ b/tests/baselines/reference/computedPropertyNames52(target=es5).errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/es6/computedProperties/computedPropertyNames52.js (0 errors) ====
     const array = [];
     for (let i = 0; i < 10; ++i) {
diff --git a/tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt b/tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt
index a8fd10ae8e4e7..4573941d5539e 100644
--- a/tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt
+++ b/tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/file1.ts(1,1): error TS2448: Block-scoped variable 'c' used before its declaration.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/file1.ts (1 errors) ====
     c;
     ~
diff --git a/tests/baselines/reference/controlFlowJavascript.errors.txt b/tests/baselines/reference/controlFlowJavascript.errors.txt
index a74d5af03dff1..e228bb80ef72d 100644
--- a/tests/baselines/reference/controlFlowJavascript.errors.txt
+++ b/tests/baselines/reference/controlFlowJavascript.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/controlFlowJavascript.js (0 errors) ====
     let cond = true;
     
diff --git a/tests/baselines/reference/declFileWithErrorsInInputDeclarationFileWithOut.errors.txt b/tests/baselines/reference/declFileWithErrorsInInputDeclarationFileWithOut.errors.txt
index e1d206ff23cf2..f15b76b5d85ec 100644
--- a/tests/baselines/reference/declFileWithErrorsInInputDeclarationFileWithOut.errors.txt
+++ b/tests/baselines/reference/declFileWithErrorsInInputDeclarationFileWithOut.errors.txt
@@ -1,11 +1,13 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/declFile.d.ts(2,5): error TS1038: A 'declare' modifier cannot be used in an already ambient context.
 tests/cases/compiler/declFile.d.ts(3,5): error TS1038: A 'declare' modifier cannot be used in an already ambient context.
 tests/cases/compiler/declFile.d.ts(5,5): error TS1038: A 'declare' modifier cannot be used in an already ambient context.
 tests/cases/compiler/declFile.d.ts(7,5): error TS1038: A 'declare' modifier cannot be used in an already ambient context.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/client.ts (0 errors) ====
     ///<reference path="declFile.d.ts"/>
     var x = new M.C(); // Declaration file wont get emitted because there are errors in declaration file
diff --git a/tests/baselines/reference/declarationFileOverwriteErrorWithOut.errors.txt b/tests/baselines/reference/declarationFileOverwriteErrorWithOut.errors.txt
index 2030449d8d798..e065bfe5aa12c 100644
--- a/tests/baselines/reference/declarationFileOverwriteErrorWithOut.errors.txt
+++ b/tests/baselines/reference/declarationFileOverwriteErrorWithOut.errors.txt
@@ -1,11 +1,13 @@
 error TS5055: Cannot write file 'tests/cases/compiler/out.d.ts' because it would overwrite input file.
   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
 !!! error TS5055: Cannot write file 'tests/cases/compiler/out.d.ts' because it would overwrite input file.
 !!! error TS5055:   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/out.d.ts (0 errors) ====
     declare class c {
     }
diff --git a/tests/baselines/reference/definePropertyOutputES3.errors.txt b/tests/baselines/reference/definePropertyOutputES3.errors.txt
index 34787d62f17c7..61ee69bfcc616 100644
--- a/tests/baselines/reference/definePropertyOutputES3.errors.txt
+++ b/tests/baselines/reference/definePropertyOutputES3.errors.txt
@@ -1,9 +1,9 @@
 error TS5048: Option 'useDefineForClassFields' cannot be specified when option 'target' is 'ES3'.
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
 !!! error TS5048: Option 'useDefineForClassFields' cannot be specified when option 'target' is 'ES3'.
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/classes/propertyMemberDeclarations/definePropertyOutputES3.ts (0 errors) ====
     class A {
         a = 12
diff --git a/tests/baselines/reference/deprecatedCompilerOptions1.errors.txt b/tests/baselines/reference/deprecatedCompilerOptions1.errors.txt
index 48f93f935068a..effa688c713b0 100644
--- a/tests/baselines/reference/deprecatedCompilerOptions1.errors.txt
+++ b/tests/baselines/reference/deprecatedCompilerOptions1.errors.txt
@@ -1,11 +1,12 @@
-/foo/tsconfig.json(3,19): error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-/foo/tsconfig.json(4,9): error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-/foo/tsconfig.json(5,9): error TS5101: Flag 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-/foo/tsconfig.json(6,9): error TS5101: Flag 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-/foo/tsconfig.json(7,9): error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-/foo/tsconfig.json(8,9): error TS5101: Flag 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-/foo/tsconfig.json(9,9): error TS5101: Flag 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-/foo/tsconfig.json(10,9): error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(3,19): error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(4,9): error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(5,9): error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(6,9): error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(7,9): error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(8,9): error TS5101: Option 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(9,9): error TS5101: Option 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(10,9): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
 ==== /foo/tsconfig.json (8 errors) ====
@@ -13,28 +14,29 @@
         "compilerOptions": {
             "target": "ES3",
                       ~~~~~
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
             "noImplicitUseStrict": true,
             ~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
             "keyofStringsOnly": true,
             ~~~~~~~~~~~~~~~~~~
-!!! error TS5101: Flag 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
             "suppressExcessPropertyErrors": true,
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5101: Flag 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
             "suppressImplicitAnyIndexErrors": true,
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
             "noStrictGenericChecks": true,
             ~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5101: Flag 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
             "charset": "utf8",
             ~~~~~~~~~
-!!! error TS5101: Flag 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
             "out": "dist.js"
             ~~~~~
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
         }
     }
     
diff --git a/tests/baselines/reference/deprecatedCompilerOptions3.errors.txt b/tests/baselines/reference/deprecatedCompilerOptions3.errors.txt
index b745353cd68c6..c484184a8cba4 100644
--- a/tests/baselines/reference/deprecatedCompilerOptions3.errors.txt
+++ b/tests/baselines/reference/deprecatedCompilerOptions3.errors.txt
@@ -1,11 +1,12 @@
-/foo/tsconfig.json(3,19): error TS5102: Flag 'ES3' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(4,9): error TS5102: Flag 'noImplicitUseStrict' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(5,9): error TS5102: Flag 'keyofStringsOnly' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(6,9): error TS5102: Flag 'suppressExcessPropertyErrors' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(7,9): error TS5102: Flag 'suppressImplicitAnyIndexErrors' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(8,9): error TS5102: Flag 'noStrictGenericChecks' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(9,9): error TS5102: Flag 'charset' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(10,9): error TS5102: Flag 'out' is deprecated. Please remove it from your configuration.
+/foo/tsconfig.json(3,19): error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(4,9): error TS5102: Option 'noImplicitUseStrict' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(5,9): error TS5102: Option 'keyofStringsOnly' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(6,9): error TS5102: Option 'suppressExcessPropertyErrors' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(7,9): error TS5102: Option 'suppressImplicitAnyIndexErrors' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(8,9): error TS5102: Option 'noStrictGenericChecks' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(9,9): error TS5102: Option 'charset' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(10,9): error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+  Use 'outFile' instead.
 
 
 ==== /foo/tsconfig.json (8 errors) ====
@@ -13,28 +14,29 @@
         "compilerOptions": {
             "target": "ES3",
                       ~~~~~
-!!! error TS5102: Flag 'ES3' is deprecated. Please remove it from your configuration.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
             "noImplicitUseStrict": true,
             ~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'noImplicitUseStrict' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'noImplicitUseStrict' has been removed. Please remove it from your configuration.
             "keyofStringsOnly": true,
             ~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'keyofStringsOnly' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'keyofStringsOnly' has been removed. Please remove it from your configuration.
             "suppressExcessPropertyErrors": true,
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'suppressExcessPropertyErrors' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'suppressExcessPropertyErrors' has been removed. Please remove it from your configuration.
             "suppressImplicitAnyIndexErrors": true,
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'suppressImplicitAnyIndexErrors' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'suppressImplicitAnyIndexErrors' has been removed. Please remove it from your configuration.
             "noStrictGenericChecks": true,
             ~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'noStrictGenericChecks' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'noStrictGenericChecks' has been removed. Please remove it from your configuration.
             "charset": "utf8",
             ~~~~~~~~~
-!!! error TS5102: Flag 'charset' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'charset' has been removed. Please remove it from your configuration.
             "out": "dist.js",
             ~~~~~
-!!! error TS5102: Flag 'out' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
         }
     }
     
diff --git a/tests/baselines/reference/deprecatedCompilerOptions4.errors.txt b/tests/baselines/reference/deprecatedCompilerOptions4.errors.txt
new file mode 100644
index 0000000000000..01d4b95238ce6
--- /dev/null
+++ b/tests/baselines/reference/deprecatedCompilerOptions4.errors.txt
@@ -0,0 +1,46 @@
+/foo/tsconfig.json(3,19): error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(4,9): error TS5102: Option 'noImplicitUseStrict' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(5,9): error TS5102: Option 'keyofStringsOnly' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(6,9): error TS5102: Option 'suppressExcessPropertyErrors' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(7,9): error TS5102: Option 'suppressImplicitAnyIndexErrors' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(8,9): error TS5102: Option 'noStrictGenericChecks' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(9,9): error TS5102: Option 'charset' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(10,9): error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+  Use 'outFile' instead.
+
+
+==== /foo/tsconfig.json (8 errors) ====
+    {
+        "compilerOptions": {
+            "target": "ES3",
+                      ~~~~~
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
+            "noImplicitUseStrict": true,
+            ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS5102: Option 'noImplicitUseStrict' has been removed. Please remove it from your configuration.
+            "keyofStringsOnly": true,
+            ~~~~~~~~~~~~~~~~~~
+!!! error TS5102: Option 'keyofStringsOnly' has been removed. Please remove it from your configuration.
+            "suppressExcessPropertyErrors": true,
+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS5102: Option 'suppressExcessPropertyErrors' has been removed. Please remove it from your configuration.
+            "suppressImplicitAnyIndexErrors": true,
+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS5102: Option 'suppressImplicitAnyIndexErrors' has been removed. Please remove it from your configuration.
+            "noStrictGenericChecks": true,
+            ~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS5102: Option 'noStrictGenericChecks' has been removed. Please remove it from your configuration.
+            "charset": "utf8",
+            ~~~~~~~~~
+!!! error TS5102: Option 'charset' has been removed. Please remove it from your configuration.
+            "out": "dist.js",
+            ~~~~~
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
+            "ignoreDeprecations": "5.0"
+        }
+    }
+    
+==== /foo/a.ts (0 errors) ====
+    const a = 1;
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/deprecatedCompilerOptions5.errors.txt b/tests/baselines/reference/deprecatedCompilerOptions5.errors.txt
index a214229ef01e7..01d4b95238ce6 100644
--- a/tests/baselines/reference/deprecatedCompilerOptions5.errors.txt
+++ b/tests/baselines/reference/deprecatedCompilerOptions5.errors.txt
@@ -1,44 +1,43 @@
-/foo/tsconfig.json(3,19): error TS5102: Flag 'ES3' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(4,9): error TS5102: Flag 'noImplicitUseStrict' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(5,9): error TS5102: Flag 'keyofStringsOnly' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(6,9): error TS5102: Flag 'suppressExcessPropertyErrors' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(7,9): error TS5102: Flag 'suppressImplicitAnyIndexErrors' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(8,9): error TS5102: Flag 'noStrictGenericChecks' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(9,9): error TS5102: Flag 'charset' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(10,9): error TS5102: Flag 'out' is deprecated. Please remove it from your configuration.
-/foo/tsconfig.json(11,31): error TS5103: Invalid value for '--ignoreDeprecations'.
+/foo/tsconfig.json(3,19): error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(4,9): error TS5102: Option 'noImplicitUseStrict' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(5,9): error TS5102: Option 'keyofStringsOnly' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(6,9): error TS5102: Option 'suppressExcessPropertyErrors' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(7,9): error TS5102: Option 'suppressImplicitAnyIndexErrors' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(8,9): error TS5102: Option 'noStrictGenericChecks' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(9,9): error TS5102: Option 'charset' has been removed. Please remove it from your configuration.
+/foo/tsconfig.json(10,9): error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+  Use 'outFile' instead.
 
 
-==== /foo/tsconfig.json (9 errors) ====
+==== /foo/tsconfig.json (8 errors) ====
     {
         "compilerOptions": {
             "target": "ES3",
                       ~~~~~
-!!! error TS5102: Flag 'ES3' is deprecated. Please remove it from your configuration.
+!!! error TS5108: Option 'target=ES3' has been removed. Please remove it from your configuration.
             "noImplicitUseStrict": true,
             ~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'noImplicitUseStrict' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'noImplicitUseStrict' has been removed. Please remove it from your configuration.
             "keyofStringsOnly": true,
             ~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'keyofStringsOnly' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'keyofStringsOnly' has been removed. Please remove it from your configuration.
             "suppressExcessPropertyErrors": true,
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'suppressExcessPropertyErrors' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'suppressExcessPropertyErrors' has been removed. Please remove it from your configuration.
             "suppressImplicitAnyIndexErrors": true,
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'suppressImplicitAnyIndexErrors' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'suppressImplicitAnyIndexErrors' has been removed. Please remove it from your configuration.
             "noStrictGenericChecks": true,
             ~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5102: Flag 'noStrictGenericChecks' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'noStrictGenericChecks' has been removed. Please remove it from your configuration.
             "charset": "utf8",
             ~~~~~~~~~
-!!! error TS5102: Flag 'charset' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'charset' has been removed. Please remove it from your configuration.
             "out": "dist.js",
             ~~~~~
-!!! error TS5102: Flag 'out' is deprecated. Please remove it from your configuration.
+!!! error TS5102: Option 'out' has been removed. Please remove it from your configuration.
+!!! error TS5102:   Use 'outFile' instead.
             "ignoreDeprecations": "5.0"
-                                  ~~~~~
-!!! error TS5103: Invalid value for '--ignoreDeprecations'.
         }
     }
     
diff --git a/tests/baselines/reference/deprecatedCompilerOptions6.errors.txt b/tests/baselines/reference/deprecatedCompilerOptions6.errors.txt
new file mode 100644
index 0000000000000..1d97da4493ad2
--- /dev/null
+++ b/tests/baselines/reference/deprecatedCompilerOptions6.errors.txt
@@ -0,0 +1,50 @@
+/foo/tsconfig.json(4,19): error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(5,9): error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(6,9): error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(7,9): error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(8,9): error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(9,9): error TS5101: Option 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(10,9): error TS5101: Option 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/foo/tsconfig.json(11,9): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
+/foo/tsconfig.json(12,31): error TS5103: Invalid value for '--ignoreDeprecations'.
+
+
+==== /foo/tsconfig.json (9 errors) ====
+    {
+        "compilerOptions": {
+            "module": "amd",
+            "target": "ES3",
+                      ~~~~~
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+            "noImplicitUseStrict": true,
+            ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+            "keyofStringsOnly": true,
+            ~~~~~~~~~~~~~~~~~~
+!!! error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+            "suppressExcessPropertyErrors": true,
+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+            "suppressImplicitAnyIndexErrors": true,
+            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+            "noStrictGenericChecks": true,
+            ~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS5101: Option 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+            "charset": "utf8",
+            ~~~~~~~~~
+!!! error TS5101: Option 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+            "out": "dist.js",
+            ~~~~~
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
+            "ignoreDeprecations": "5.1"
+                                  ~~~~~
+!!! error TS5103: Invalid value for '--ignoreDeprecations'.
+        }
+    }
+    
+==== /foo/a.ts (0 errors) ====
+    const a = 1;
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/deprecatedCompilerOptions6.js b/tests/baselines/reference/deprecatedCompilerOptions6.js
new file mode 100644
index 0000000000000..a4778b0abf319
--- /dev/null
+++ b/tests/baselines/reference/deprecatedCompilerOptions6.js
@@ -0,0 +1,6 @@
+//// [a.ts]
+const a = 1;
+
+
+//// [dist.js]
+var a = 1;
diff --git a/tests/baselines/reference/deprecatedCompilerOptions6.symbols b/tests/baselines/reference/deprecatedCompilerOptions6.symbols
new file mode 100644
index 0000000000000..d0f69434bc68f
--- /dev/null
+++ b/tests/baselines/reference/deprecatedCompilerOptions6.symbols
@@ -0,0 +1,4 @@
+=== /foo/a.ts ===
+const a = 1;
+>a : Symbol(a, Decl(a.ts, 0, 5))
+
diff --git a/tests/baselines/reference/deprecatedCompilerOptions6.types b/tests/baselines/reference/deprecatedCompilerOptions6.types
new file mode 100644
index 0000000000000..ce7bf5f351b1a
--- /dev/null
+++ b/tests/baselines/reference/deprecatedCompilerOptions6.types
@@ -0,0 +1,5 @@
+=== /foo/a.ts ===
+const a = 1;
+>a : 1
+>1 : 1
+
diff --git a/tests/baselines/reference/dynamicRequire.errors.txt b/tests/baselines/reference/dynamicRequire.errors.txt
index 3461945c79112..eadb566a1a700 100644
--- a/tests/baselines/reference/dynamicRequire.errors.txt
+++ b/tests/baselines/reference/dynamicRequire.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.js (0 errors) ====
     function foo(name) {
         var s = require("t/" + name)
diff --git a/tests/baselines/reference/emptyFile-declaration.errors.txt b/tests/baselines/reference/emptyFile-declaration.errors.txt
index 9d98970e9f772..eb83a609a586d 100644
--- a/tests/baselines/reference/emptyFile-declaration.errors.txt
+++ b/tests/baselines/reference/emptyFile-declaration.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/emptyFile-declaration.ts (0 errors) ====
     
\ No newline at end of file
diff --git a/tests/baselines/reference/emptyFile-souremap.errors.txt b/tests/baselines/reference/emptyFile-souremap.errors.txt
index 09c7f933c28c3..5105df5b501e5 100644
--- a/tests/baselines/reference/emptyFile-souremap.errors.txt
+++ b/tests/baselines/reference/emptyFile-souremap.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/emptyFile-souremap.ts (0 errors) ====
     
\ No newline at end of file
diff --git a/tests/baselines/reference/es3-amd.errors.txt b/tests/baselines/reference/es3-amd.errors.txt
index ca031e9ef9de8..64971aff3775f 100644
--- a/tests/baselines/reference/es3-amd.errors.txt
+++ b/tests/baselines/reference/es3-amd.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/es3-amd.ts (0 errors) ====
     class A
     {
diff --git a/tests/baselines/reference/es3-declaration-amd.errors.txt b/tests/baselines/reference/es3-declaration-amd.errors.txt
index d8cd0698e2d29..368157acf6e09 100644
--- a/tests/baselines/reference/es3-declaration-amd.errors.txt
+++ b/tests/baselines/reference/es3-declaration-amd.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/es3-declaration-amd.ts (0 errors) ====
     class A
     {
diff --git a/tests/baselines/reference/es3-jsx-preserve.errors.txt b/tests/baselines/reference/es3-jsx-preserve.errors.txt
index 5510b37cdb6ca..4d7a35cb95fe8 100644
--- a/tests/baselines/reference/es3-jsx-preserve.errors.txt
+++ b/tests/baselines/reference/es3-jsx-preserve.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/es3-jsx-preserve.tsx (0 errors) ====
     const React: any = null;
     
diff --git a/tests/baselines/reference/es3-jsx-react-native.errors.txt b/tests/baselines/reference/es3-jsx-react-native.errors.txt
index af2d8e3d69609..b74b87442a61f 100644
--- a/tests/baselines/reference/es3-jsx-react-native.errors.txt
+++ b/tests/baselines/reference/es3-jsx-react-native.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/es3-jsx-react-native.tsx (0 errors) ====
     const React: any = null;
     
diff --git a/tests/baselines/reference/es3-jsx-react.errors.txt b/tests/baselines/reference/es3-jsx-react.errors.txt
index d779b268e0168..da2d76b87374a 100644
--- a/tests/baselines/reference/es3-jsx-react.errors.txt
+++ b/tests/baselines/reference/es3-jsx-react.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/es3-jsx-react.tsx (0 errors) ====
     const React: any = null;
     
diff --git a/tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.errors.txt b/tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.errors.txt
index 7cc9d08cb5b35..6bb7d5bf90a09 100644
--- a/tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.errors.txt
+++ b/tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts(2,7): error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '-0o1'.
 tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts(3,7): error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '0o2'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts (2 errors) ====
     enum E {
       x = -01,
diff --git a/tests/baselines/reference/es3-oldStyleOctalLiteralTypes.errors.txt b/tests/baselines/reference/es3-oldStyleOctalLiteralTypes.errors.txt
index 00b0c9ce2273a..796881d795e3b 100644
--- a/tests/baselines/reference/es3-oldStyleOctalLiteralTypes.errors.txt
+++ b/tests/baselines/reference/es3-oldStyleOctalLiteralTypes.errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts(1,8): error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '0o10'.
 tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts(2,8): error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '-0o20'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts (2 errors) ====
     let x: 010;
            ~~~
diff --git a/tests/baselines/reference/es3-sourcemap-amd.errors.txt b/tests/baselines/reference/es3-sourcemap-amd.errors.txt
index 2601c56c331ce..1f2dbfcba168f 100644
--- a/tests/baselines/reference/es3-sourcemap-amd.errors.txt
+++ b/tests/baselines/reference/es3-sourcemap-amd.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/es3-sourcemap-amd.ts (0 errors) ====
     class A
     {
diff --git a/tests/baselines/reference/es3defaultAliasIsQuoted.errors.txt b/tests/baselines/reference/es3defaultAliasIsQuoted.errors.txt
index edbf56d0b8ddd..6dce55bc42654 100644
--- a/tests/baselines/reference/es3defaultAliasIsQuoted.errors.txt
+++ b/tests/baselines/reference/es3defaultAliasIsQuoted.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/es3defaultAliasQuoted_file0.ts (0 errors) ====
     export class Foo {
         static CONSTANT = "Foo";
diff --git a/tests/baselines/reference/esModuleInteropWithExportStar(target=es3).errors.txt b/tests/baselines/reference/esModuleInteropWithExportStar(target=es3).errors.txt
index 07c186e687a66..f1e3f6a3ce614 100644
--- a/tests/baselines/reference/esModuleInteropWithExportStar(target=es3).errors.txt
+++ b/tests/baselines/reference/esModuleInteropWithExportStar(target=es3).errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/fs.d.ts (0 errors) ====
     export const x: number;
 ==== tests/cases/compiler/mjts.ts (0 errors) ====
diff --git a/tests/baselines/reference/excessPropertyErrorsSuppressed.errors.txt b/tests/baselines/reference/excessPropertyErrorsSuppressed.errors.txt
index bde06f085e48c..856b68fdf54ab 100644
--- a/tests/baselines/reference/excessPropertyErrorsSuppressed.errors.txt
+++ b/tests/baselines/reference/excessPropertyErrorsSuppressed.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/excessPropertyErrorsSuppressed.ts (0 errors) ====
     var x: { a: string } = { a: "hello", b: 42 };  // No error
     
\ No newline at end of file
diff --git a/tests/baselines/reference/exportAndImport-es3-amd.errors.txt b/tests/baselines/reference/exportAndImport-es3-amd.errors.txt
index 1fd8ac8007e17..d9b0a538dc0bd 100644
--- a/tests/baselines/reference/exportAndImport-es3-amd.errors.txt
+++ b/tests/baselines/reference/exportAndImport-es3-amd.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/es6/modules/m1.ts (0 errors) ====
     export default function f1() {
     }
diff --git a/tests/baselines/reference/exportAndImport-es3.errors.txt b/tests/baselines/reference/exportAndImport-es3.errors.txt
index d6afb2baf6585..c68799d9c0dc6 100644
--- a/tests/baselines/reference/exportAndImport-es3.errors.txt
+++ b/tests/baselines/reference/exportAndImport-es3.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/es6/modules/m1.ts (0 errors) ====
     export default function f1() {
     }
diff --git a/tests/baselines/reference/exportDefaultInJsFile01.errors.txt b/tests/baselines/reference/exportDefaultInJsFile01.errors.txt
index 89cb8f66b9b66..3908b927cfdda 100644
--- a/tests/baselines/reference/exportDefaultInJsFile01.errors.txt
+++ b/tests/baselines/reference/exportDefaultInJsFile01.errors.txt
@@ -1,10 +1,10 @@
 error TS5055: Cannot write file 'tests/cases/conformance/salsa/myFile01.js' because it would overwrite input file.
   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
 !!! error TS5055: Cannot write file 'tests/cases/conformance/salsa/myFile01.js' because it would overwrite input file.
 !!! error TS5055:   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/salsa/myFile01.js (0 errors) ====
     export default "hello";
\ No newline at end of file
diff --git a/tests/baselines/reference/exportsAndImportsWithUnderscores1.errors.txt b/tests/baselines/reference/exportsAndImportsWithUnderscores1.errors.txt
index 8eadb640fe61e..9236ea28ce824 100644
--- a/tests/baselines/reference/exportsAndImportsWithUnderscores1.errors.txt
+++ b/tests/baselines/reference/exportsAndImportsWithUnderscores1.errors.txt
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/es6/modules/m1.ts(5,5): error TS1005: ',' expected.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/es6/modules/m1.ts (1 errors) ====
     var R: any
     export default R = {
diff --git a/tests/baselines/reference/exportsAndImportsWithUnderscores2.errors.txt b/tests/baselines/reference/exportsAndImportsWithUnderscores2.errors.txt
index 57403dc2198fb..a4e781650c1e5 100644
--- a/tests/baselines/reference/exportsAndImportsWithUnderscores2.errors.txt
+++ b/tests/baselines/reference/exportsAndImportsWithUnderscores2.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/es6/modules/m1.ts (0 errors) ====
     var R: any
     export default R = {
diff --git a/tests/baselines/reference/exportsAndImportsWithUnderscores3.errors.txt b/tests/baselines/reference/exportsAndImportsWithUnderscores3.errors.txt
index 68c1db5fc50f7..3a8b29a45896e 100644
--- a/tests/baselines/reference/exportsAndImportsWithUnderscores3.errors.txt
+++ b/tests/baselines/reference/exportsAndImportsWithUnderscores3.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/es6/modules/m1.ts (0 errors) ====
     var R: any
     export default R = {
diff --git a/tests/baselines/reference/exportsAndImportsWithUnderscores4.errors.txt b/tests/baselines/reference/exportsAndImportsWithUnderscores4.errors.txt
index d73759ed55e03..63128d237acaa 100644
--- a/tests/baselines/reference/exportsAndImportsWithUnderscores4.errors.txt
+++ b/tests/baselines/reference/exportsAndImportsWithUnderscores4.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/es6/modules/m1.ts (0 errors) ====
     declare var console: any;
     export function _() {
diff --git a/tests/baselines/reference/filesEmittingIntoSameOutputWithOutOption.errors.txt b/tests/baselines/reference/filesEmittingIntoSameOutputWithOutOption.errors.txt
index 5a0d6657412ab..f5464085a76b7 100644
--- a/tests/baselines/reference/filesEmittingIntoSameOutputWithOutOption.errors.txt
+++ b/tests/baselines/reference/filesEmittingIntoSameOutputWithOutOption.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     export class c {
     }
diff --git a/tests/baselines/reference/genericSetterInClassTypeJsDoc.errors.txt b/tests/baselines/reference/genericSetterInClassTypeJsDoc.errors.txt
index 80216644c8d84..c840a88ad33ca 100644
--- a/tests/baselines/reference/genericSetterInClassTypeJsDoc.errors.txt
+++ b/tests/baselines/reference/genericSetterInClassTypeJsDoc.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/classes/members/classTypes/genericSetterInClassTypeJsDoc.js (0 errors) ====
     /**
      * @template T
diff --git a/tests/baselines/reference/globalThisVarDeclaration.errors.txt b/tests/baselines/reference/globalThisVarDeclaration.errors.txt
index c01f85ad6a454..6a5d72fced162 100644
--- a/tests/baselines/reference/globalThisVarDeclaration.errors.txt
+++ b/tests/baselines/reference/globalThisVarDeclaration.errors.txt
@@ -1,11 +1,13 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/conformance/es2019/actual.ts(12,5): error TS2339: Property 'a' does not exist on type 'Window'.
 tests/cases/conformance/es2019/actual.ts(13,5): error TS2339: Property 'b' does not exist on type 'Window'.
 tests/cases/conformance/es2019/b.js(12,5): error TS2339: Property 'a' does not exist on type 'Window'.
 tests/cases/conformance/es2019/b.js(13,5): error TS2339: Property 'b' does not exist on type 'Window'.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/es2019/b.js (2 errors) ====
     var a = 10;
     this.a;
diff --git a/tests/baselines/reference/importCallExpressionAsyncES3AMD.errors.txt b/tests/baselines/reference/importCallExpressionAsyncES3AMD.errors.txt
index c79fc28b48cfe..8d2dd823ae0dc 100644
--- a/tests/baselines/reference/importCallExpressionAsyncES3AMD.errors.txt
+++ b/tests/baselines/reference/importCallExpressionAsyncES3AMD.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/dynamicImport/test.ts (0 errors) ====
     export async function fn() {
         const req = await import('./test') // ONE
diff --git a/tests/baselines/reference/importCallExpressionAsyncES3CJS.errors.txt b/tests/baselines/reference/importCallExpressionAsyncES3CJS.errors.txt
index c79fc28b48cfe..8d2dd823ae0dc 100644
--- a/tests/baselines/reference/importCallExpressionAsyncES3CJS.errors.txt
+++ b/tests/baselines/reference/importCallExpressionAsyncES3CJS.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/dynamicImport/test.ts (0 errors) ====
     export async function fn() {
         const req = await import('./test') // ONE
diff --git a/tests/baselines/reference/importCallExpressionAsyncES3System.errors.txt b/tests/baselines/reference/importCallExpressionAsyncES3System.errors.txt
index c79fc28b48cfe..8d2dd823ae0dc 100644
--- a/tests/baselines/reference/importCallExpressionAsyncES3System.errors.txt
+++ b/tests/baselines/reference/importCallExpressionAsyncES3System.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/dynamicImport/test.ts (0 errors) ====
     export async function fn() {
         const req = await import('./test') // ONE
diff --git a/tests/baselines/reference/importCallExpressionAsyncES3UMD.errors.txt b/tests/baselines/reference/importCallExpressionAsyncES3UMD.errors.txt
index c79fc28b48cfe..8d2dd823ae0dc 100644
--- a/tests/baselines/reference/importCallExpressionAsyncES3UMD.errors.txt
+++ b/tests/baselines/reference/importCallExpressionAsyncES3UMD.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/dynamicImport/test.ts (0 errors) ====
     export async function fn() {
         const req = await import('./test') // ONE
diff --git a/tests/baselines/reference/importsNotUsedAsValues_error.errors.txt b/tests/baselines/reference/importsNotUsedAsValues_error.errors.txt
index 943af5f043dde..dd2eda5644c57 100644
--- a/tests/baselines/reference/importsNotUsedAsValues_error.errors.txt
+++ b/tests/baselines/reference/importsNotUsedAsValues_error.errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 /b.ts(1,1): error TS1371: This import is never used as a value and must use 'import type' because 'importsNotUsedAsValues' is set to 'error'.
 /c.ts(1,1): error TS1371: This import is never used as a value and must use 'import type' because 'importsNotUsedAsValues' is set to 'error'.
@@ -7,7 +7,7 @@ error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop function
 /i.ts(1,1): error TS1371: This import is never used as a value and must use 'import type' because 'importsNotUsedAsValues' is set to 'error'.
 
 
-!!! error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== /a.ts (0 errors) ====
     export default class {}
diff --git a/tests/baselines/reference/incrementalOut.errors.txt b/tests/baselines/reference/incrementalOut.errors.txt
index 58069665e7e22..ac131062c1993 100644
--- a/tests/baselines/reference/incrementalOut.errors.txt
+++ b/tests/baselines/reference/incrementalOut.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/incrementalOut.ts (0 errors) ====
     const x = 10;
     
diff --git a/tests/baselines/reference/inferringClassMembersFromAssignments.errors.txt b/tests/baselines/reference/inferringClassMembersFromAssignments.errors.txt
index 16bece7b7b7ef..beb9e1eca33b3 100644
--- a/tests/baselines/reference/inferringClassMembersFromAssignments.errors.txt
+++ b/tests/baselines/reference/inferringClassMembersFromAssignments.errors.txt
@@ -1,10 +1,12 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/conformance/salsa/a.js(14,13): error TS7008: Member 'inMethodNullable' implicitly has an 'any' type.
 tests/cases/conformance/salsa/a.js(20,9): error TS2322: Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/salsa/a.js(39,9): error TS2322: Type 'boolean' is not assignable to type 'number'.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/salsa/a.js (3 errors) ====
     class C {
         constructor() {
diff --git a/tests/baselines/reference/inlineSourceMap.errors.txt b/tests/baselines/reference/inlineSourceMap.errors.txt
index fd4506186cfef..edcf4b9d86cc8 100644
--- a/tests/baselines/reference/inlineSourceMap.errors.txt
+++ b/tests/baselines/reference/inlineSourceMap.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/inlineSourceMap.ts (0 errors) ====
     var x = 0;
     console.log(x);
\ No newline at end of file
diff --git a/tests/baselines/reference/inlineSourceMap2.errors.txt b/tests/baselines/reference/inlineSourceMap2.errors.txt
index 41de14359bdf0..08316c78261e3 100644
--- a/tests/baselines/reference/inlineSourceMap2.errors.txt
+++ b/tests/baselines/reference/inlineSourceMap2.errors.txt
@@ -1,13 +1,15 @@
 error TS5053: Option 'mapRoot' cannot be specified with option 'inlineSourceMap'.
 error TS5053: Option 'sourceMap' cannot be specified with option 'inlineSourceMap'.
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
 !!! error TS5053: Option 'mapRoot' cannot be specified with option 'inlineSourceMap'.
 !!! error TS5053: Option 'sourceMap' cannot be specified with option 'inlineSourceMap'.
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/inlineSourceMap2.ts (0 errors) ====
     // configuration errors
     
diff --git a/tests/baselines/reference/inlineSources.errors.txt b/tests/baselines/reference/inlineSources.errors.txt
index 3e80237b69391..7e354d8a02bf7 100644
--- a/tests/baselines/reference/inlineSources.errors.txt
+++ b/tests/baselines/reference/inlineSources.errors.txt
@@ -1,9 +1,11 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     var a = 0;
     console.log(a);
diff --git a/tests/baselines/reference/inlineSources2.errors.txt b/tests/baselines/reference/inlineSources2.errors.txt
index 3e80237b69391..7e354d8a02bf7 100644
--- a/tests/baselines/reference/inlineSources2.errors.txt
+++ b/tests/baselines/reference/inlineSources2.errors.txt
@@ -1,9 +1,11 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     var a = 0;
     console.log(a);
diff --git a/tests/baselines/reference/isLiteral2.errors.txt b/tests/baselines/reference/isLiteral2.errors.txt
index da56a3d549afa..f1d6f83823ff5 100644
--- a/tests/baselines/reference/isLiteral2.errors.txt
+++ b/tests/baselines/reference/isLiteral2.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/isLiteral2.ts (0 errors) ====
     var x: number = 02343
\ No newline at end of file
diff --git a/tests/baselines/reference/isolatedModulesOut.errors.txt b/tests/baselines/reference/isolatedModulesOut.errors.txt
index e87ef53482462..0d4d4cd3bd40d 100644
--- a/tests/baselines/reference/isolatedModulesOut.errors.txt
+++ b/tests/baselines/reference/isolatedModulesOut.errors.txt
@@ -1,10 +1,12 @@
 error TS5053: Option 'out' cannot be specified with option 'isolatedModules'.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/file1.ts(1,1): error TS6131: Cannot compile modules using option 'out' unless the '--module' flag is 'amd' or 'system'.
 
 
 !!! error TS5053: Option 'out' cannot be specified with option 'isolatedModules'.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/file1.ts (1 errors) ====
     export var x;
     ~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationClassMethodContainingArrowFunction.errors.txt b/tests/baselines/reference/jsFileCompilationClassMethodContainingArrowFunction.errors.txt
index fb77ff760d2aa..aaece85510a20 100644
--- a/tests/baselines/reference/jsFileCompilationClassMethodContainingArrowFunction.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationClassMethodContainingArrowFunction.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.js (0 errors) ====
     class c {
         method(a) {
diff --git a/tests/baselines/reference/jsFileCompilationDuplicateFunctionImplementation.errors.txt b/tests/baselines/reference/jsFileCompilationDuplicateFunctionImplementation.errors.txt
index ed2c697b88eca..5ad35537fc3ce 100644
--- a/tests/baselines/reference/jsFileCompilationDuplicateFunctionImplementation.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationDuplicateFunctionImplementation.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/a.ts(1,10): error TS2393: Duplicate function implementation.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/b.js (0 errors) ====
     function foo() {
         return 10;
diff --git a/tests/baselines/reference/jsFileCompilationDuplicateFunctionImplementationFileOrderReversed.errors.txt b/tests/baselines/reference/jsFileCompilationDuplicateFunctionImplementationFileOrderReversed.errors.txt
index b629125b74f3a..b90d746d3f7a4 100644
--- a/tests/baselines/reference/jsFileCompilationDuplicateFunctionImplementationFileOrderReversed.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationDuplicateFunctionImplementationFileOrderReversed.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/a.ts(1,10): error TS2393: Duplicate function implementation.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (1 errors) ====
     function foo() {
              ~~~
diff --git a/tests/baselines/reference/jsFileCompilationDuplicateVariable.errors.txt b/tests/baselines/reference/jsFileCompilationDuplicateVariable.errors.txt
index 71eaa47b58138..4bb13b6f6075b 100644
--- a/tests/baselines/reference/jsFileCompilationDuplicateVariable.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationDuplicateVariable.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     var x = 10;
     
diff --git a/tests/baselines/reference/jsFileCompilationDuplicateVariableErrorReported.errors.txt b/tests/baselines/reference/jsFileCompilationDuplicateVariableErrorReported.errors.txt
index fec222ace70fb..bf39086071125 100644
--- a/tests/baselines/reference/jsFileCompilationDuplicateVariableErrorReported.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationDuplicateVariableErrorReported.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/a.ts(1,5): error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' must be of type 'string', but here has type 'number'.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/b.js (0 errors) ====
     var x = "hello";
     
diff --git a/tests/baselines/reference/jsFileCompilationEmitDeclarations.errors.txt b/tests/baselines/reference/jsFileCompilationEmitDeclarations.errors.txt
index 6deb90634f36c..ea2af3c251dd2 100644
--- a/tests/baselines/reference/jsFileCompilationEmitDeclarations.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationEmitDeclarations.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     class c {
     }
diff --git a/tests/baselines/reference/jsFileCompilationEmitTrippleSlashReference.errors.txt b/tests/baselines/reference/jsFileCompilationEmitTrippleSlashReference.errors.txt
index dec141bf8e24d..8723135ebeb51 100644
--- a/tests/baselines/reference/jsFileCompilationEmitTrippleSlashReference.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationEmitTrippleSlashReference.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     class c {
     }
diff --git a/tests/baselines/reference/jsFileCompilationErrorOnDeclarationsWithJsFileReferenceWithOut.errors.txt b/tests/baselines/reference/jsFileCompilationErrorOnDeclarationsWithJsFileReferenceWithOut.errors.txt
index 9b6c3b09dba95..f92092f97d7e7 100644
--- a/tests/baselines/reference/jsFileCompilationErrorOnDeclarationsWithJsFileReferenceWithOut.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationErrorOnDeclarationsWithJsFileReferenceWithOut.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     class c {
     }
diff --git a/tests/baselines/reference/jsFileCompilationLetBeingRenamed.errors.txt b/tests/baselines/reference/jsFileCompilationLetBeingRenamed.errors.txt
index a6e2584b2de1b..b566ff0a349b5 100644
--- a/tests/baselines/reference/jsFileCompilationLetBeingRenamed.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationLetBeingRenamed.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.js (0 errors) ====
     function foo(a) {
         for (let a = 0; a < 10; a++) {
diff --git a/tests/baselines/reference/jsFileCompilationLetDeclarationOrder.errors.txt b/tests/baselines/reference/jsFileCompilationLetDeclarationOrder.errors.txt
index c51efb592aab6..1e5192ea2d55d 100644
--- a/tests/baselines/reference/jsFileCompilationLetDeclarationOrder.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationLetDeclarationOrder.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/b.js (0 errors) ====
     let a = 10;
     b = 30;
diff --git a/tests/baselines/reference/jsFileCompilationLetDeclarationOrder2.errors.txt b/tests/baselines/reference/jsFileCompilationLetDeclarationOrder2.errors.txt
index eb1253352dcc3..8b11b436e3638 100644
--- a/tests/baselines/reference/jsFileCompilationLetDeclarationOrder2.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationLetDeclarationOrder2.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/a.ts(2,1): error TS2448: Block-scoped variable 'a' used before its declaration.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (1 errors) ====
     let b = 30;
     a = 10;
diff --git a/tests/baselines/reference/jsFileCompilationNoErrorWithoutDeclarationsWithJsFileReferenceWithOut.errors.txt b/tests/baselines/reference/jsFileCompilationNoErrorWithoutDeclarationsWithJsFileReferenceWithOut.errors.txt
index d66c233fddd8c..42c0b385f57d9 100644
--- a/tests/baselines/reference/jsFileCompilationNoErrorWithoutDeclarationsWithJsFileReferenceWithOut.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationNoErrorWithoutDeclarationsWithJsFileReferenceWithOut.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     class c {
     }
diff --git a/tests/baselines/reference/jsFileCompilationNonNullAssertion.errors.txt b/tests/baselines/reference/jsFileCompilationNonNullAssertion.errors.txt
index f331e6e99d15f..767ce9cd60410 100644
--- a/tests/baselines/reference/jsFileCompilationNonNullAssertion.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationNonNullAssertion.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 /src/a.js(1,1): error TS8013: Non-null assertions can only be used in TypeScript files.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== /src/a.js (1 errors) ====
     0!
     ~~
diff --git a/tests/baselines/reference/jsFileCompilationRestParamJsDocFunction.errors.txt b/tests/baselines/reference/jsFileCompilationRestParamJsDocFunction.errors.txt
index a35da21ea5265..13fc148d58f0d 100644
--- a/tests/baselines/reference/jsFileCompilationRestParamJsDocFunction.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationRestParamJsDocFunction.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/_apply.js (0 errors) ====
     /**
      * A faster alternative to `Function#apply`, this function invokes `func`
diff --git a/tests/baselines/reference/jsFileCompilationRestParameter.errors.txt b/tests/baselines/reference/jsFileCompilationRestParameter.errors.txt
index d7c0e0e44f0fc..83904b67ec3c7 100644
--- a/tests/baselines/reference/jsFileCompilationRestParameter.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationRestParameter.errors.txt
@@ -1,6 +1,8 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.js (0 errors) ====
     function foo(...a) { }
\ No newline at end of file
diff --git a/tests/baselines/reference/jsFileCompilationShortHandProperty.errors.txt b/tests/baselines/reference/jsFileCompilationShortHandProperty.errors.txt
index 1c8b6b6b8142c..bb0541bd213fd 100644
--- a/tests/baselines/reference/jsFileCompilationShortHandProperty.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationShortHandProperty.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.js (0 errors) ====
     function foo() {
         var a = 10;
diff --git a/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt b/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt
index a64ae32073722..ec53565069f85 100644
--- a/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationTypeAssertions.errors.txt
@@ -1,10 +1,12 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 /src/a.js(1,6): error TS8016: Type assertion expressions can only be used in TypeScript files.
 /src/a.js(2,10): error TS17008: JSX element 'string' has no corresponding closing tag.
 /src/a.js(3,1): error TS1005: '</' expected.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== /src/a.js (3 errors) ====
     0 as number;
          ~~~~~~
diff --git a/tests/baselines/reference/jsFileCompilationWithEnabledCompositeOption.errors.txt b/tests/baselines/reference/jsFileCompilationWithEnabledCompositeOption.errors.txt
index 6deb90634f36c..ea2af3c251dd2 100644
--- a/tests/baselines/reference/jsFileCompilationWithEnabledCompositeOption.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationWithEnabledCompositeOption.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     class c {
     }
diff --git a/tests/baselines/reference/jsFileCompilationWithOut.errors.txt b/tests/baselines/reference/jsFileCompilationWithOut.errors.txt
index 6deb90634f36c..ea2af3c251dd2 100644
--- a/tests/baselines/reference/jsFileCompilationWithOut.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationWithOut.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     class c {
     }
diff --git a/tests/baselines/reference/jsFileCompilationWithOutDeclarationFileNameSameAsInputJsFile.errors.txt b/tests/baselines/reference/jsFileCompilationWithOutDeclarationFileNameSameAsInputJsFile.errors.txt
index 4da9946c20fcf..0414a8f4cd78c 100644
--- a/tests/baselines/reference/jsFileCompilationWithOutDeclarationFileNameSameAsInputJsFile.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationWithOutDeclarationFileNameSameAsInputJsFile.errors.txt
@@ -1,11 +1,13 @@
 error TS5055: Cannot write file 'tests/cases/compiler/b.d.ts' because it would overwrite input file.
   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
 !!! error TS5055: Cannot write file 'tests/cases/compiler/b.d.ts' because it would overwrite input file.
 !!! error TS5055:   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     class c {
     }
diff --git a/tests/baselines/reference/jsFileCompilationWithOutFileNameSameAsInputJsFile.errors.txt b/tests/baselines/reference/jsFileCompilationWithOutFileNameSameAsInputJsFile.errors.txt
index 1486572733439..9ac70b004d4a1 100644
--- a/tests/baselines/reference/jsFileCompilationWithOutFileNameSameAsInputJsFile.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationWithOutFileNameSameAsInputJsFile.errors.txt
@@ -1,11 +1,13 @@
 error TS5055: Cannot write file 'tests/cases/compiler/b.js' because it would overwrite input file.
   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
 !!! error TS5055: Cannot write file 'tests/cases/compiler/b.js' because it would overwrite input file.
 !!! error TS5055:   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     class c {
     }
diff --git a/tests/baselines/reference/jsObjectsMarkedAsOpenEnded.errors.txt b/tests/baselines/reference/jsObjectsMarkedAsOpenEnded.errors.txt
index f93fcb9fb1d13..3d449a9036634 100644
--- a/tests/baselines/reference/jsObjectsMarkedAsOpenEnded.errors.txt
+++ b/tests/baselines/reference/jsObjectsMarkedAsOpenEnded.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/salsa/a.js (0 errors) ====
     var variable = {};
     variable.a = 0;
diff --git a/tests/baselines/reference/jsdocAccessibilityTagsDeclarations.errors.txt b/tests/baselines/reference/jsdocAccessibilityTagsDeclarations.errors.txt
index 0362c38096ddf..959f66106cb9d 100644
--- a/tests/baselines/reference/jsdocAccessibilityTagsDeclarations.errors.txt
+++ b/tests/baselines/reference/jsdocAccessibilityTagsDeclarations.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/jsdoc/jsdocAccessibilityTagDeclarations.js (0 errors) ====
     class Protected {
         /** @protected */
diff --git a/tests/baselines/reference/jsdocLiteral.errors.txt b/tests/baselines/reference/jsdocLiteral.errors.txt
index 0f536faf8be0d..1f481ab8a48fc 100644
--- a/tests/baselines/reference/jsdocLiteral.errors.txt
+++ b/tests/baselines/reference/jsdocLiteral.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/jsdoc/in.js (0 errors) ====
     /**
      * @param {'literal'} p1
diff --git a/tests/baselines/reference/jsdocNeverUndefinedNull.errors.txt b/tests/baselines/reference/jsdocNeverUndefinedNull.errors.txt
index 90a0a466a9059..1ff5603a87c6c 100644
--- a/tests/baselines/reference/jsdocNeverUndefinedNull.errors.txt
+++ b/tests/baselines/reference/jsdocNeverUndefinedNull.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/jsdoc/in.js (0 errors) ====
     /**
      * @param {never} p1
diff --git a/tests/baselines/reference/jsdocReadonlyDeclarations.errors.txt b/tests/baselines/reference/jsdocReadonlyDeclarations.errors.txt
index 55c604356e9c8..4e9f17d45ea7b 100644
--- a/tests/baselines/reference/jsdocReadonlyDeclarations.errors.txt
+++ b/tests/baselines/reference/jsdocReadonlyDeclarations.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/jsdoc/jsdocReadonlyDeclarations.js (0 errors) ====
     class C {
         /** @readonly */
diff --git a/tests/baselines/reference/jsdocReturnTag1.errors.txt b/tests/baselines/reference/jsdocReturnTag1.errors.txt
index 71c91fb64311a..1b4a0846f8f85 100644
--- a/tests/baselines/reference/jsdocReturnTag1.errors.txt
+++ b/tests/baselines/reference/jsdocReturnTag1.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/jsdoc/returns.js (0 errors) ====
     /**
      * @returns {string} This comment is not currently exposed
diff --git a/tests/baselines/reference/keepImportsInDts3.errors.txt b/tests/baselines/reference/keepImportsInDts3.errors.txt
index fb065821766ce..6e77abc047996 100644
--- a/tests/baselines/reference/keepImportsInDts3.errors.txt
+++ b/tests/baselines/reference/keepImportsInDts3.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== c:/test.ts (0 errors) ====
     export {};
 ==== c:/app/main.ts (0 errors) ====
diff --git a/tests/baselines/reference/keepImportsInDts4.errors.txt b/tests/baselines/reference/keepImportsInDts4.errors.txt
index 681a872ec8073..65ddeb354410c 100644
--- a/tests/baselines/reference/keepImportsInDts4.errors.txt
+++ b/tests/baselines/reference/keepImportsInDts4.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/folder/test.ts (0 errors) ====
     export {};
 ==== tests/cases/compiler/main.ts (0 errors) ====
diff --git a/tests/baselines/reference/keyofDoesntContainSymbols.errors.txt b/tests/baselines/reference/keyofDoesntContainSymbols.errors.txt
index e2ecb4a85151e..6fcd7d8328135 100644
--- a/tests/baselines/reference/keyofDoesntContainSymbols.errors.txt
+++ b/tests/baselines/reference/keyofDoesntContainSymbols.errors.txt
@@ -1,10 +1,10 @@
-error TS5101: Flag 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/compiler/keyofDoesntContainSymbols.ts(11,30): error TS2345: Argument of type 'string' is not assignable to parameter of type 'number'.
 tests/cases/compiler/keyofDoesntContainSymbols.ts(14,23): error TS2345: Argument of type 'unique symbol' is not assignable to parameter of type '"str" | "num"'.
 tests/cases/compiler/keyofDoesntContainSymbols.ts(17,23): error TS2345: Argument of type '0' is not assignable to parameter of type '"str" | "num"'.
 
 
-!!! error TS5101: Flag 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/keyofDoesntContainSymbols.ts (3 errors) ====
     const sym = Symbol();
     const num = 0;
diff --git a/tests/baselines/reference/lateBoundConstraintTypeChecksCorrectly.errors.txt b/tests/baselines/reference/lateBoundConstraintTypeChecksCorrectly.errors.txt
index 0e095f9c3966e..ef2eefccb1971 100644
--- a/tests/baselines/reference/lateBoundConstraintTypeChecksCorrectly.errors.txt
+++ b/tests/baselines/reference/lateBoundConstraintTypeChecksCorrectly.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/lateBoundConstraintTypeChecksCorrectly.ts (0 errors) ====
     declare const fooProp: unique symbol;
     declare const barProp: unique symbol;
diff --git a/tests/baselines/reference/letDeclarations-useBeforeDefinition2.errors.txt b/tests/baselines/reference/letDeclarations-useBeforeDefinition2.errors.txt
index bbf3a657fb9b2..7a673583bb4ce 100644
--- a/tests/baselines/reference/letDeclarations-useBeforeDefinition2.errors.txt
+++ b/tests/baselines/reference/letDeclarations-useBeforeDefinition2.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/file1.ts(1,1): error TS2448: Block-scoped variable 'l' used before its declaration.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/file1.ts (1 errors) ====
     l;
     ~
diff --git a/tests/baselines/reference/mappedTypeUnionConstraintInferences.errors.txt b/tests/baselines/reference/mappedTypeUnionConstraintInferences.errors.txt
index cf7a0bef89c9a..765079fca4722 100644
--- a/tests/baselines/reference/mappedTypeUnionConstraintInferences.errors.txt
+++ b/tests/baselines/reference/mappedTypeUnionConstraintInferences.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'keyofStringsOnly' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/mappedTypeUnionConstraintInferences.ts (0 errors) ====
     export declare type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
     export declare type PartialProperties<T, K extends keyof T> = Partial<Pick<T, K>> & Omit<T, K>;
diff --git a/tests/baselines/reference/methodsReturningThis.errors.txt b/tests/baselines/reference/methodsReturningThis.errors.txt
index 1fcd047bcbf82..08edddb8b37e4 100644
--- a/tests/baselines/reference/methodsReturningThis.errors.txt
+++ b/tests/baselines/reference/methodsReturningThis.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/salsa/input.js (0 errors) ====
     function Class()
     {
diff --git a/tests/baselines/reference/moduleAugmentationsBundledOutput1.errors.txt b/tests/baselines/reference/moduleAugmentationsBundledOutput1.errors.txt
index b90d6637fcbb1..814be0951419d 100644
--- a/tests/baselines/reference/moduleAugmentationsBundledOutput1.errors.txt
+++ b/tests/baselines/reference/moduleAugmentationsBundledOutput1.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/m1.ts (0 errors) ====
     export class Cls {
     }
diff --git a/tests/baselines/reference/moduleAugmentationsImports1.errors.txt b/tests/baselines/reference/moduleAugmentationsImports1.errors.txt
index 81f4df1e6bcaf..d3a444ba86d97 100644
--- a/tests/baselines/reference/moduleAugmentationsImports1.errors.txt
+++ b/tests/baselines/reference/moduleAugmentationsImports1.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     export class A {}
     
diff --git a/tests/baselines/reference/moduleAugmentationsImports2.errors.txt b/tests/baselines/reference/moduleAugmentationsImports2.errors.txt
index 623f42a3ecc4d..28638042d1771 100644
--- a/tests/baselines/reference/moduleAugmentationsImports2.errors.txt
+++ b/tests/baselines/reference/moduleAugmentationsImports2.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     export class A {}
     
diff --git a/tests/baselines/reference/moduleAugmentationsImports3.errors.txt b/tests/baselines/reference/moduleAugmentationsImports3.errors.txt
index 8dc3e9ede79da..056e39be90147 100644
--- a/tests/baselines/reference/moduleAugmentationsImports3.errors.txt
+++ b/tests/baselines/reference/moduleAugmentationsImports3.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/main.ts (0 errors) ====
     /// <reference path="d.d.ts"/>
     import {A} from "./a";
diff --git a/tests/baselines/reference/moduleAugmentationsImports4.errors.txt b/tests/baselines/reference/moduleAugmentationsImports4.errors.txt
index 0665903c1dd13..7f6768ce721c9 100644
--- a/tests/baselines/reference/moduleAugmentationsImports4.errors.txt
+++ b/tests/baselines/reference/moduleAugmentationsImports4.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/main.ts (0 errors) ====
     /// <reference path="d.d.ts"/>
     /// <reference path="e.d.ts"/>
diff --git a/tests/baselines/reference/multipleDeclarations.errors.txt b/tests/baselines/reference/multipleDeclarations.errors.txt
index f74a0bb784f10..387ec52360cca 100644
--- a/tests/baselines/reference/multipleDeclarations.errors.txt
+++ b/tests/baselines/reference/multipleDeclarations.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/salsa/input.js (0 errors) ====
     function C() {
         this.m = null;
diff --git a/tests/baselines/reference/noImplicitAnyIndexingSuppressed.errors.txt b/tests/baselines/reference/noImplicitAnyIndexingSuppressed.errors.txt
index 4ebf67f2587be..db25b74a8aa58 100644
--- a/tests/baselines/reference/noImplicitAnyIndexingSuppressed.errors.txt
+++ b/tests/baselines/reference/noImplicitAnyIndexingSuppressed.errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/compiler/noImplicitAnyIndexingSuppressed.ts(19,9): error TS2339: Property 'hi' does not exist on type '{}'.
 tests/cases/compiler/noImplicitAnyIndexingSuppressed.ts(22,9): error TS2339: Property '10' does not exist on type '{}'.
 
 
-!!! error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/noImplicitAnyIndexingSuppressed.ts (2 errors) ====
     enum MyEmusEnum {
         emu
diff --git a/tests/baselines/reference/noImplicitUseStrict_amd.errors.txt b/tests/baselines/reference/noImplicitUseStrict_amd.errors.txt
index 3e0c45283d065..1761236fbe5cf 100644
--- a/tests/baselines/reference/noImplicitUseStrict_amd.errors.txt
+++ b/tests/baselines/reference/noImplicitUseStrict_amd.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/noImplicitUseStrict_amd.ts (0 errors) ====
     export var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/noImplicitUseStrict_commonjs.errors.txt b/tests/baselines/reference/noImplicitUseStrict_commonjs.errors.txt
index c8dbd9e67f16c..55c9ce71a32a1 100644
--- a/tests/baselines/reference/noImplicitUseStrict_commonjs.errors.txt
+++ b/tests/baselines/reference/noImplicitUseStrict_commonjs.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/noImplicitUseStrict_commonjs.ts (0 errors) ====
     export var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/noImplicitUseStrict_es6.errors.txt b/tests/baselines/reference/noImplicitUseStrict_es6.errors.txt
index 015dd75aff894..36e9817b50451 100644
--- a/tests/baselines/reference/noImplicitUseStrict_es6.errors.txt
+++ b/tests/baselines/reference/noImplicitUseStrict_es6.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/noImplicitUseStrict_es6.ts (0 errors) ====
     export var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/noImplicitUseStrict_system.errors.txt b/tests/baselines/reference/noImplicitUseStrict_system.errors.txt
index 74379d2bbceb1..664b9bbd77f06 100644
--- a/tests/baselines/reference/noImplicitUseStrict_system.errors.txt
+++ b/tests/baselines/reference/noImplicitUseStrict_system.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/noImplicitUseStrict_system.ts (0 errors) ====
     export var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/noImplicitUseStrict_umd.errors.txt b/tests/baselines/reference/noImplicitUseStrict_umd.errors.txt
index 17a6269f25b42..1d2c3eafbe7f0 100644
--- a/tests/baselines/reference/noImplicitUseStrict_umd.errors.txt
+++ b/tests/baselines/reference/noImplicitUseStrict_umd.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/noImplicitUseStrict_umd.ts (0 errors) ====
     export var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/noStrictGenericChecks.errors.txt b/tests/baselines/reference/noStrictGenericChecks.errors.txt
index c760a864a3b18..17c05780ea811 100644
--- a/tests/baselines/reference/noStrictGenericChecks.errors.txt
+++ b/tests/baselines/reference/noStrictGenericChecks.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noStrictGenericChecks' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/noStrictGenericChecks.ts (0 errors) ====
     type A = <T, U>(x: T, y: U) => [T, U];
     type B = <S>(x: S, y: S) => [S, S];
diff --git a/tests/baselines/reference/nonPrimitiveIndexingWithForInSupressError.errors.txt b/tests/baselines/reference/nonPrimitiveIndexingWithForInSupressError.errors.txt
index 6d8098c507e0f..94751b019a8bf 100644
--- a/tests/baselines/reference/nonPrimitiveIndexingWithForInSupressError.errors.txt
+++ b/tests/baselines/reference/nonPrimitiveIndexingWithForInSupressError.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/types/nonPrimitive/nonPrimitiveIndexingWithForInSupressError.ts (0 errors) ====
     var a: object;
     
diff --git a/tests/baselines/reference/numericUnderscoredSeparator(target=es3).errors.txt b/tests/baselines/reference/numericUnderscoredSeparator(target=es3).errors.txt
index 163033c30a04b..c2f218879d239 100644
--- a/tests/baselines/reference/numericUnderscoredSeparator(target=es3).errors.txt
+++ b/tests/baselines/reference/numericUnderscoredSeparator(target=es3).errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/numericUnderscoredSeparator.ts (0 errors) ====
     1_000_000_000_000
     0b1010_0001_1000_0101
diff --git a/tests/baselines/reference/objectLiteralErrorsES3.errors.txt b/tests/baselines/reference/objectLiteralErrorsES3.errors.txt
index 912d2e1616cee..249c43afb3bab 100644
--- a/tests/baselines/reference/objectLiteralErrorsES3.errors.txt
+++ b/tests/baselines/reference/objectLiteralErrorsES3.errors.txt
@@ -1,11 +1,11 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts(1,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts(3,40): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts (4 errors) ====
     var e1 = { get a() { return 4; } };
                    ~
diff --git a/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.errors.txt b/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.errors.txt
index f5d1d539f9c28..8e1ccabbeac44 100644
--- a/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.errors.txt
+++ b/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts (0 errors) ====
     // string named numeric properties are legal and distinct when indexed by string values
     // indexed numerically the value is converted to a number
diff --git a/tests/baselines/reference/optionsOutAndNoModuleGen.errors.txt b/tests/baselines/reference/optionsOutAndNoModuleGen.errors.txt
index 8702ba6720166..0f346faf1fd57 100644
--- a/tests/baselines/reference/optionsOutAndNoModuleGen.errors.txt
+++ b/tests/baselines/reference/optionsOutAndNoModuleGen.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/compiler/optionsOutAndNoModuleGen.ts(1,1): error TS6131: Cannot compile modules using option 'out' unless the '--module' flag is 'amd' or 'system'.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/optionsOutAndNoModuleGen.ts (1 errors) ====
     export var x = 10;
     ~~~~~~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/out-flag3.errors.txt b/tests/baselines/reference/out-flag3.errors.txt
index b82f9f1f77bb6..8a073b09dab11 100644
--- a/tests/baselines/reference/out-flag3.errors.txt
+++ b/tests/baselines/reference/out-flag3.errors.txt
@@ -1,10 +1,12 @@
 error TS5053: Option 'out' cannot be specified with option 'outFile'.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
 !!! error TS5053: Option 'out' cannot be specified with option 'outFile'.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     // --out and --outFile error
diff --git a/tests/baselines/reference/parserArrowFunctionExpression10(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression10(target=es3).errors.txt
index 305361bc25aa5..20e0ea6e0a43e 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression10(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression10(target=es3).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,1): error TS2304: Cannot find name 'a'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,11): error TS2304: Cannot find name 'c'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,11): error TS8010: Type annotations can only be used in TypeScript files.
@@ -10,7 +10,7 @@ tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,27): error TS2304: Cannot find name 'f'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (5 errors) ====
     a ? (b) : c => (d) : e => f // Not legal JS; "Unexpected token ':'" at last colon
     ~
diff --git a/tests/baselines/reference/parserArrowFunctionExpression11(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression11(target=es3).errors.txt
index ffccff6fadb43..37da3d8382076 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression11(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression11(target=es3).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,1): error TS2304: Cannot find name 'a'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,5): error TS2304: Cannot find name 'b'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,9): error TS2304: Cannot find name 'c'.
@@ -11,7 +11,7 @@ tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,24): error TS2304: Cannot find name 'f'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (5 errors) ====
     a ? b ? c : (d) : e => f // Legal JS
     ~
diff --git a/tests/baselines/reference/parserArrowFunctionExpression12(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression12(target=es3).errors.txt
index 555a0bd0fe48e..0ec0ea0e216f7 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression12(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression12(target=es3).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,1): error TS2304: Cannot find name 'a'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,13): error TS2304: Cannot find name 'c'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,22): error TS2304: Cannot find name 'e'.
@@ -7,7 +7,7 @@ tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,22): error TS2304: Cannot find name 'e'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (3 errors) ====
     a ? (b) => (c): d => e // Legal JS
     ~
diff --git a/tests/baselines/reference/parserArrowFunctionExpression13(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression13(target=es3).errors.txt
index 9324e59e8f93d..96f863778fa73 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression13(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression13(target=es3).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,1): error TS2304: Cannot find name 'a'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,11): error TS2304: Cannot find name 'a'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,21): error TS8010: Type annotations can only be used in TypeScript files.
@@ -6,7 +6,7 @@ tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,11): error TS2304: Cannot find name 'a'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (3 errors) ====
     a ? () => a() : (): any => null; // Not legal JS; "Unexpected token ')'" at last paren
     ~
diff --git a/tests/baselines/reference/parserArrowFunctionExpression14(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression14(target=es3).errors.txt
index 3e3daad2486cb..963b0de199462 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression14(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression14(target=es3).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,1): error TS2304: Cannot find name 'a'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,11): error TS8010: Type annotations can only be used in TypeScript files.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,20): error TS8009: The '?' modifier can only be used in TypeScript files.
@@ -11,7 +11,7 @@ tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,46): error TS2304: Cannot find name 'e'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (7 errors) ====
     a() ? (b: number, c?: string): void => d() : e; // Not legal JS; "Unexpected token ':'" at first colon
     ~
diff --git a/tests/baselines/reference/parserArrowFunctionExpression15(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression15(target=es3).errors.txt
index 0de3cd0966599..d120553b86dbf 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression15(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression15(target=es3).errors.txt
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,18): error TS8010: Type annotations can only be used in TypeScript files.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (1 errors) ====
     false ? (param): string => param : null // Not legal JS; "Unexpected token ':'" at last colon
                      ~~~~~~
diff --git a/tests/baselines/reference/parserArrowFunctionExpression16(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression16(target=es3).errors.txt
index 13e7b275d42cf..7f8af79a95c61 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression16(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression16(target=es3).errors.txt
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,25): error TS8010: Type annotations can only be used in TypeScript files.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (1 errors) ====
     true ? false ? (param): string => param : null : null // Not legal JS; "Unexpected token ':'" at last colon
                             ~~~~~~
diff --git a/tests/baselines/reference/parserArrowFunctionExpression17(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression17(target=es3).errors.txt
index d7a808b6fc9eb..1153fb7ed531a 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression17(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression17(target=es3).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,1): error TS2304: Cannot find name 'a'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,5): error TS2304: Cannot find name 'b'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,15): error TS2304: Cannot find name 'd'.
@@ -10,7 +10,7 @@ tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,20): error TS2304: Cannot find name 'e'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (5 errors) ====
     a ? b : (c) : d => e // Not legal JS; "Unexpected token ':'" at last colon
     ~
diff --git a/tests/baselines/reference/parserArrowFunctionExpression8(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression8(target=es3).errors.txt
index bc6585aa73faf..44e9198ca5d54 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression8(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression8(target=es3).errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,1): error TS2304: Cannot find name 'x'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,1): error TS2304: Cannot find name 'x'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (1 errors) ====
     x ? y => ({ y }) : z => ({ z }) // Legal JS
     ~
diff --git a/tests/baselines/reference/parserArrowFunctionExpression9(target=es3).errors.txt b/tests/baselines/reference/parserArrowFunctionExpression9(target=es3).errors.txt
index 2fda8e3b43a38..366ef89b1e3e4 100644
--- a/tests/baselines/reference/parserArrowFunctionExpression9(target=es3).errors.txt
+++ b/tests/baselines/reference/parserArrowFunctionExpression9(target=es3).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,1): error TS2304: Cannot find name 'b'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,6): error TS2304: Cannot find name 'c'.
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js(1,16): error TS2304: Cannot find name 'e'.
@@ -7,7 +7,7 @@ tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,
 tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileTs.ts(1,16): error TS2304: Cannot find name 'e'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/parser/ecmascript5/ArrowFunctionExpressions/fileJs.js (3 errors) ====
     b ? (c) : d => e // Legal JS
     ~
diff --git a/tests/baselines/reference/preserveUnusedImports.errors.txt b/tests/baselines/reference/preserveUnusedImports.errors.txt
index 51d2f0b8a4a64..32f67a0b60d29 100644
--- a/tests/baselines/reference/preserveUnusedImports.errors.txt
+++ b/tests/baselines/reference/preserveUnusedImports.errors.txt
@@ -1,8 +1,8 @@
-error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 
-!!! error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     export type A = {};
diff --git a/tests/baselines/reference/preserveValueImports(isolatedmodules=false).errors.txt b/tests/baselines/reference/preserveValueImports(isolatedmodules=false).errors.txt
index b40ffd45f3649..448ddf02f4a21 100644
--- a/tests/baselines/reference/preserveValueImports(isolatedmodules=false).errors.txt
+++ b/tests/baselines/reference/preserveValueImports(isolatedmodules=false).errors.txt
@@ -1,11 +1,11 @@
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 tests/cases/conformance/externalModules/typeOnly/d.ts(1,1): error TS1203: Export assignment cannot be used when targeting ECMAScript modules. Consider using 'export default' or another module format instead.
 tests/cases/conformance/externalModules/typeOnly/e.ts(1,1): error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
 tests/cases/conformance/externalModules/typeOnly/e.ts(2,1): error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
 
 
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== tests/cases/conformance/externalModules/typeOnly/a.ts (0 errors) ====
     export default {};
diff --git a/tests/baselines/reference/preserveValueImports(isolatedmodules=true).errors.txt b/tests/baselines/reference/preserveValueImports(isolatedmodules=true).errors.txt
index beb7d216b120d..ed33d69dab7a8 100644
--- a/tests/baselines/reference/preserveValueImports(isolatedmodules=true).errors.txt
+++ b/tests/baselines/reference/preserveValueImports(isolatedmodules=true).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 tests/cases/conformance/externalModules/typeOnly/b.ts(1,19): error TS1444: 'D' is a type and must be imported using a type-only import when 'preserveValueImports' and 'isolatedModules' are both enabled.
 tests/cases/conformance/externalModules/typeOnly/d.ts(1,1): error TS1203: Export assignment cannot be used when targeting ECMAScript modules. Consider using 'export default' or another module format instead.
@@ -6,7 +6,7 @@ tests/cases/conformance/externalModules/typeOnly/e.ts(1,1): error TS1202: Import
 tests/cases/conformance/externalModules/typeOnly/e.ts(2,1): error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
 
 
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== tests/cases/conformance/externalModules/typeOnly/a.ts (0 errors) ====
     export default {};
diff --git a/tests/baselines/reference/preserveValueImports_errors(isolatedmodules=false).errors.txt b/tests/baselines/reference/preserveValueImports_errors(isolatedmodules=false).errors.txt
index 21f8551b4f652..cf12f79b061c5 100644
--- a/tests/baselines/reference/preserveValueImports_errors(isolatedmodules=false).errors.txt
+++ b/tests/baselines/reference/preserveValueImports_errors(isolatedmodules=false).errors.txt
@@ -1,8 +1,8 @@
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== tests/cases/conformance/externalModules/typeOnly/a.ts (0 errors) ====
     export type A = {};
diff --git a/tests/baselines/reference/preserveValueImports_errors(isolatedmodules=true).errors.txt b/tests/baselines/reference/preserveValueImports_errors(isolatedmodules=true).errors.txt
index f748372c31b9e..1179d751515cf 100644
--- a/tests/baselines/reference/preserveValueImports_errors(isolatedmodules=true).errors.txt
+++ b/tests/baselines/reference/preserveValueImports_errors(isolatedmodules=true).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 tests/cases/conformance/externalModules/typeOnly/c.ts(1,8): error TS1444: 'DefaultA' is a type and must be imported using a type-only import when 'preserveValueImports' and 'isolatedModules' are both enabled.
 tests/cases/conformance/externalModules/typeOnly/c.ts(2,10): error TS1444: 'A' is a type and must be imported using a type-only import when 'preserveValueImports' and 'isolatedModules' are both enabled.
@@ -10,7 +10,7 @@ tests/cases/conformance/externalModules/typeOnly/e.ts(1,10): error TS1444: 'AA'
 tests/cases/conformance/externalModules/typeOnly/e.ts(1,14): error TS1446: 'BB' resolves to a type-only declaration and must be imported using a type-only import when 'preserveValueImports' and 'isolatedModules' are both enabled.
 
 
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== tests/cases/conformance/externalModules/typeOnly/a.ts (0 errors) ====
     export type A = {};
diff --git a/tests/baselines/reference/preserveValueImports_importsNotUsedAsValues.errors.txt b/tests/baselines/reference/preserveValueImports_importsNotUsedAsValues.errors.txt
index f31ce03bea234..364382869daf9 100644
--- a/tests/baselines/reference/preserveValueImports_importsNotUsedAsValues.errors.txt
+++ b/tests/baselines/reference/preserveValueImports_importsNotUsedAsValues.errors.txt
@@ -1,12 +1,12 @@
-error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 
-!!! error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== /mod.ts (0 errors) ====
     export type A = unknown;
diff --git a/tests/baselines/reference/preserveValueImports_mixedImports.errors.txt b/tests/baselines/reference/preserveValueImports_mixedImports.errors.txt
index cf72fd6e391b7..098b6d9cd6d56 100644
--- a/tests/baselines/reference/preserveValueImports_mixedImports.errors.txt
+++ b/tests/baselines/reference/preserveValueImports_mixedImports.errors.txt
@@ -1,9 +1,9 @@
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 /index.ts(1,21): error TS1444: 'ComponentProps' is a type and must be imported using a type-only import when 'preserveValueImports' and 'isolatedModules' are both enabled.
 
 
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== /exports.ts (0 errors) ====
     export function Component() {}
diff --git a/tests/baselines/reference/preserveValueImports_module(module=amd).errors.txt b/tests/baselines/reference/preserveValueImports_module(module=amd).errors.txt
index 26645a278635c..76bc6b88fe467 100644
--- a/tests/baselines/reference/preserveValueImports_module(module=amd).errors.txt
+++ b/tests/baselines/reference/preserveValueImports_module(module=amd).errors.txt
@@ -1,10 +1,10 @@
 error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 
 !!! error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== tests/cases/conformance/externalModules/typeOnly/preserveValueImports_module.ts (0 errors) ====
     export {};
diff --git a/tests/baselines/reference/preserveValueImports_module(module=commonjs).errors.txt b/tests/baselines/reference/preserveValueImports_module(module=commonjs).errors.txt
index 26645a278635c..76bc6b88fe467 100644
--- a/tests/baselines/reference/preserveValueImports_module(module=commonjs).errors.txt
+++ b/tests/baselines/reference/preserveValueImports_module(module=commonjs).errors.txt
@@ -1,10 +1,10 @@
 error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 
 !!! error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== tests/cases/conformance/externalModules/typeOnly/preserveValueImports_module.ts (0 errors) ====
     export {};
diff --git a/tests/baselines/reference/preserveValueImports_module(module=es2015).errors.txt b/tests/baselines/reference/preserveValueImports_module(module=es2015).errors.txt
index 6c0aed993f474..4fbed5427644f 100644
--- a/tests/baselines/reference/preserveValueImports_module(module=es2015).errors.txt
+++ b/tests/baselines/reference/preserveValueImports_module(module=es2015).errors.txt
@@ -1,8 +1,8 @@
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== tests/cases/conformance/externalModules/typeOnly/preserveValueImports_module.ts (0 errors) ====
     export {};
diff --git a/tests/baselines/reference/preserveValueImports_module(module=system).errors.txt b/tests/baselines/reference/preserveValueImports_module(module=system).errors.txt
index 26645a278635c..76bc6b88fe467 100644
--- a/tests/baselines/reference/preserveValueImports_module(module=system).errors.txt
+++ b/tests/baselines/reference/preserveValueImports_module(module=system).errors.txt
@@ -1,10 +1,10 @@
 error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 
 !!! error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== tests/cases/conformance/externalModules/typeOnly/preserveValueImports_module.ts (0 errors) ====
     export {};
diff --git a/tests/baselines/reference/privateNameES5Ban(target=es3).errors.txt b/tests/baselines/reference/privateNameES5Ban(target=es3).errors.txt
index ea490e3be76ac..64d71a61d6296 100644
--- a/tests/baselines/reference/privateNameES5Ban(target=es3).errors.txt
+++ b/tests/baselines/reference/privateNameES5Ban(target=es3).errors.txt
@@ -1,4 +1,4 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 tests/cases/conformance/classes/members/privateNames/privateNameES5Ban.ts(3,5): error TS18028: Private identifiers are only available when targeting ECMAScript 2015 and higher.
 tests/cases/conformance/classes/members/privateNames/privateNameES5Ban.ts(4,5): error TS18028: Private identifiers are only available when targeting ECMAScript 2015 and higher.
 tests/cases/conformance/classes/members/privateNames/privateNameES5Ban.ts(5,12): error TS18028: Private identifiers are only available when targeting ECMAScript 2015 and higher.
@@ -9,7 +9,7 @@ tests/cases/conformance/classes/members/privateNames/privateNameES5Ban.ts(9,16):
 tests/cases/conformance/classes/members/privateNames/privateNameES5Ban.ts(10,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/classes/members/privateNames/privateNameES5Ban.ts (8 errors) ====
     class A {
         constructor() {}
diff --git a/tests/baselines/reference/project/declarationDir3/amd/declarationDir3.errors.txt b/tests/baselines/reference/project/declarationDir3/amd/declarationDir3.errors.txt
index 718e3075de4af..d9678b62ff161 100644
--- a/tests/baselines/reference/project/declarationDir3/amd/declarationDir3.errors.txt
+++ b/tests/baselines/reference/project/declarationDir3/amd/declarationDir3.errors.txt
@@ -1,9 +1,11 @@
 error TS5053: Option 'declarationDir' cannot be specified with option 'out'.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
 !!! error TS5053: Option 'declarationDir' cannot be specified with option 'out'.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== b.ts (0 errors) ====
     export class B {
         
diff --git a/tests/baselines/reference/project/declarationDir3/node/declarationDir3.errors.txt b/tests/baselines/reference/project/declarationDir3/node/declarationDir3.errors.txt
index 4ef11942519a7..059f6d13a1f97 100644
--- a/tests/baselines/reference/project/declarationDir3/node/declarationDir3.errors.txt
+++ b/tests/baselines/reference/project/declarationDir3/node/declarationDir3.errors.txt
@@ -1,10 +1,12 @@
 error TS5053: Option 'declarationDir' cannot be specified with option 'out'.
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
 !!! error TS5053: Option 'declarationDir' cannot be specified with option 'out'.
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== b.ts (0 errors) ====
     export class B {
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/amd/jsFileCompilationDifferentNamesNotSpecified.errors.txt b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/amd/jsFileCompilationDifferentNamesNotSpecified.errors.txt
index dfd04fe25554c..fce9f492876db 100644
--- a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/amd/jsFileCompilationDifferentNamesNotSpecified.errors.txt
+++ b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/amd/jsFileCompilationDifferentNamesNotSpecified.errors.txt
@@ -1,11 +1,13 @@
-DifferentNamesNotSpecified/tsconfig.json(2,24): error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+DifferentNamesNotSpecified/tsconfig.json(2,24): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
 ==== DifferentNamesNotSpecified/tsconfig.json (1 errors) ====
     {
       "compilerOptions": { "out": "test.js" }
                            ~~~~~
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
     }
 ==== DifferentNamesNotSpecified/a.ts (0 errors) ====
     var test = 10;
\ No newline at end of file
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/node/jsFileCompilationDifferentNamesNotSpecified.errors.txt b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/node/jsFileCompilationDifferentNamesNotSpecified.errors.txt
index 715c0424fce5e..82f2252cca75e 100644
--- a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/node/jsFileCompilationDifferentNamesNotSpecified.errors.txt
+++ b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecified/node/jsFileCompilationDifferentNamesNotSpecified.errors.txt
@@ -1,4 +1,5 @@
-DifferentNamesNotSpecified/tsconfig.json(2,24): error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+DifferentNamesNotSpecified/tsconfig.json(2,24): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 DifferentNamesNotSpecified/tsconfig.json(2,24): error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
@@ -6,7 +7,8 @@ DifferentNamesNotSpecified/tsconfig.json(2,24): error TS6082: Only 'amd' and 'sy
     {
       "compilerOptions": { "out": "test.js" }
                            ~~~~~
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
                            ~~~~~
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
     }
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs/amd/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs.errors.txt b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs/amd/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs.errors.txt
index 546920ddfc290..1bea6c8ad8b6d 100644
--- a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs/amd/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs.errors.txt
+++ b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs/amd/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs.errors.txt
@@ -1,4 +1,5 @@
-DifferentNamesNotSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+DifferentNamesNotSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
 ==== DifferentNamesNotSpecifiedWithAllowJs/tsconfig.json (1 errors) ====
@@ -6,7 +7,8 @@ DifferentNamesNotSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Flag 'ou
       "compilerOptions": {
         "out": "test.js",
         ~~~~~
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
         "allowJs": true
       }
     }
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs/node/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs.errors.txt b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs/node/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs.errors.txt
index 28c065f08513c..ed7a1ac63058d 100644
--- a/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs/node/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs.errors.txt
+++ b/tests/baselines/reference/project/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs/node/jsFileCompilationDifferentNamesNotSpecifiedWithAllowJs.errors.txt
@@ -1,4 +1,5 @@
-DifferentNamesNotSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+DifferentNamesNotSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 DifferentNamesNotSpecifiedWithAllowJs/tsconfig.json(3,5): error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
@@ -7,7 +8,8 @@ DifferentNamesNotSpecifiedWithAllowJs/tsconfig.json(3,5): error TS6082: Only 'am
       "compilerOptions": {
         "out": "test.js",
         ~~~~~
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
         ~~~~~
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
         "allowJs": true
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/amd/jsFileCompilationDifferentNamesSpecified.errors.txt b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/amd/jsFileCompilationDifferentNamesSpecified.errors.txt
index bd6b1a651cb73..8d87f5102ea9b 100644
--- a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/amd/jsFileCompilationDifferentNamesSpecified.errors.txt
+++ b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/amd/jsFileCompilationDifferentNamesSpecified.errors.txt
@@ -1,7 +1,8 @@
 error TS6504: File 'DifferentNamesSpecified/b.js' is a JavaScript file. Did you mean to enable the 'allowJs' option?
   The file is in the program because:
     Part of 'files' list in tsconfig.json
-DifferentNamesSpecified/tsconfig.json(2,24): error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+DifferentNamesSpecified/tsconfig.json(2,24): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
 !!! error TS6504: File 'DifferentNamesSpecified/b.js' is a JavaScript file. Did you mean to enable the 'allowJs' option?
@@ -12,7 +13,8 @@ DifferentNamesSpecified/tsconfig.json(2,24): error TS5101: Flag 'out' is depreca
     {
       "compilerOptions": { "out": "test.js" },
                            ~~~~~
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
       "files": [ "a.ts", "b.js" ]
     }
 ==== DifferentNamesSpecified/a.ts (0 errors) ====
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/node/jsFileCompilationDifferentNamesSpecified.errors.txt b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/node/jsFileCompilationDifferentNamesSpecified.errors.txt
index ad4abcf43f0cd..17632e3d6be23 100644
--- a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/node/jsFileCompilationDifferentNamesSpecified.errors.txt
+++ b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecified/node/jsFileCompilationDifferentNamesSpecified.errors.txt
@@ -1,7 +1,8 @@
 error TS6504: File 'DifferentNamesSpecified/b.js' is a JavaScript file. Did you mean to enable the 'allowJs' option?
   The file is in the program because:
     Part of 'files' list in tsconfig.json
-DifferentNamesSpecified/tsconfig.json(2,24): error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+DifferentNamesSpecified/tsconfig.json(2,24): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 DifferentNamesSpecified/tsconfig.json(2,24): error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
@@ -13,7 +14,8 @@ DifferentNamesSpecified/tsconfig.json(2,24): error TS6082: Only 'amd' and 'syste
     {
       "compilerOptions": { "out": "test.js" },
                            ~~~~~
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
                            ~~~~~
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
       "files": [ "a.ts", "b.js" ]
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecifiedWithAllowJs/amd/jsFileCompilationDifferentNamesSpecifiedWithAllowJs.errors.txt b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecifiedWithAllowJs/amd/jsFileCompilationDifferentNamesSpecifiedWithAllowJs.errors.txt
index 1bdab1a6c2c7e..75423493ecfe0 100644
--- a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecifiedWithAllowJs/amd/jsFileCompilationDifferentNamesSpecifiedWithAllowJs.errors.txt
+++ b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecifiedWithAllowJs/amd/jsFileCompilationDifferentNamesSpecifiedWithAllowJs.errors.txt
@@ -1,4 +1,5 @@
-DifferentNamesSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+DifferentNamesSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
 ==== DifferentNamesSpecifiedWithAllowJs/tsconfig.json (1 errors) ====
@@ -6,7 +7,8 @@ DifferentNamesSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Flag 'out'
       "compilerOptions": {
         "out": "test.js",
         ~~~~~
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
         "allowJs": true
       },
       "files": [ "a.ts", "b.js" ]
diff --git a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecifiedWithAllowJs/node/jsFileCompilationDifferentNamesSpecifiedWithAllowJs.errors.txt b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecifiedWithAllowJs/node/jsFileCompilationDifferentNamesSpecifiedWithAllowJs.errors.txt
index d8e6b8c15db82..e1b40f2e08191 100644
--- a/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecifiedWithAllowJs/node/jsFileCompilationDifferentNamesSpecifiedWithAllowJs.errors.txt
+++ b/tests/baselines/reference/project/jsFileCompilationDifferentNamesSpecifiedWithAllowJs/node/jsFileCompilationDifferentNamesSpecifiedWithAllowJs.errors.txt
@@ -1,4 +1,5 @@
-DifferentNamesSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+DifferentNamesSpecifiedWithAllowJs/tsconfig.json(3,5): error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 DifferentNamesSpecifiedWithAllowJs/tsconfig.json(3,5): error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
@@ -7,7 +8,8 @@ DifferentNamesSpecifiedWithAllowJs/tsconfig.json(3,5): error TS6082: Only 'amd'
       "compilerOptions": {
         "out": "test.js",
         ~~~~~
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
         ~~~~~
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
         "allowJs": true
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/node/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/node/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/node/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/node/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
index 138924ccd44e8..37fa51f273f66 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/node/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/node/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
index 1c7541e7c3b0d..66f7ea7b3a250 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/node/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/node/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/mapRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/mapRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
index 149618ce17936..3c0d816fe85cc 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/mapRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/mapRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/node/mapRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/node/mapRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
index be553e6738677..6a7483593d26f 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/node/mapRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/node/mapRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
index 9f6499ceb2aa2..8274ae8907a7b 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/node/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/node/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
index 43eba59e956df..e6b1a69828125 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/node/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/node/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMultifolderSpecifyOutputFile/amd/mapRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathMultifolderSpecifyOutputFile/amd/mapRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
index f099f50146368..0effddb001fce 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMultifolderSpecifyOutputFile/amd/mapRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMultifolderSpecifyOutputFile/amd/mapRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMultifolderSpecifyOutputFile/node/mapRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathMultifolderSpecifyOutputFile/node/mapRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
index 0a2373c98b3ab..67c1d0220148d 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMultifolderSpecifyOutputFile/node/mapRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMultifolderSpecifyOutputFile/node/mapRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathSimpleSpecifyOutputFile/amd/mapRootAbsolutePathSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathSimpleSpecifyOutputFile/amd/mapRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
index bf5258bd2d8ac..8bb337d288045 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathSimpleSpecifyOutputFile/amd/mapRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathSimpleSpecifyOutputFile/amd/mapRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathSimpleSpecifyOutputFile/node/mapRootAbsolutePathSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathSimpleSpecifyOutputFile/node/mapRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
index dac40e9b915c3..cec00391a2706 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathSimpleSpecifyOutputFile/node/mapRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathSimpleSpecifyOutputFile/node/mapRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathSingleFileSpecifyOutputFile/amd/mapRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathSingleFileSpecifyOutputFile/amd/mapRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
index e228759a197b5..ce79abb2a79c5 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathSingleFileSpecifyOutputFile/amd/mapRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathSingleFileSpecifyOutputFile/amd/mapRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== test.ts (0 errors) ====
     var a1 = 10;
     class c1 {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathSingleFileSpecifyOutputFile/node/mapRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathSingleFileSpecifyOutputFile/node/mapRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
index a3401edd171f3..8030290f6a09d 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathSingleFileSpecifyOutputFile/node/mapRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathSingleFileSpecifyOutputFile/node/mapRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== test.ts (0 errors) ====
     var a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
index abf1877840249..2e1e4f9438ef7 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathSubfolderSpecifyOutputFile/amd/mapRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathSubfolderSpecifyOutputFile/node/mapRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootAbsolutePathSubfolderSpecifyOutputFile/node/mapRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
index 906028d54de16..b54ec12445ead 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathSubfolderSpecifyOutputFile/node/mapRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootAbsolutePathSubfolderSpecifyOutputFile/node/mapRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/amd/mapRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/amd/mapRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/amd/mapRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/amd/mapRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/node/mapRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/node/mapRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/node/mapRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/node/mapRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/amd/mapRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/amd/mapRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
index 138924ccd44e8..37fa51f273f66 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/amd/mapRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/amd/mapRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/node/mapRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/node/mapRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
index 1c7541e7c3b0d..66f7ea7b3a250 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/node/mapRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/node/mapRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/amd/mapRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/amd/mapRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
index 149618ce17936..3c0d816fe85cc 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/amd/mapRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/amd/mapRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/node/mapRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/node/mapRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
index be553e6738677..6a7483593d26f 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/node/mapRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/node/mapRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/amd/mapRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/amd/mapRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
index 9f6499ceb2aa2..8274ae8907a7b 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/amd/mapRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/amd/mapRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/node/mapRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/node/mapRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
index 43eba59e956df..e6b1a69828125 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/node/mapRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/node/mapRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathMultifolderSpecifyOutputFile/amd/mapRootRelativePathMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathMultifolderSpecifyOutputFile/amd/mapRootRelativePathMultifolderSpecifyOutputFile.errors.txt
index f099f50146368..0effddb001fce 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMultifolderSpecifyOutputFile/amd/mapRootRelativePathMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathMultifolderSpecifyOutputFile/amd/mapRootRelativePathMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootRelativePathMultifolderSpecifyOutputFile/node/mapRootRelativePathMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathMultifolderSpecifyOutputFile/node/mapRootRelativePathMultifolderSpecifyOutputFile.errors.txt
index 0a2373c98b3ab..67c1d0220148d 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMultifolderSpecifyOutputFile/node/mapRootRelativePathMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathMultifolderSpecifyOutputFile/node/mapRootRelativePathMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathSimpleSpecifyOutputFile/amd/mapRootRelativePathSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathSimpleSpecifyOutputFile/amd/mapRootRelativePathSimpleSpecifyOutputFile.errors.txt
index bf5258bd2d8ac..8bb337d288045 100644
--- a/tests/baselines/reference/project/mapRootRelativePathSimpleSpecifyOutputFile/amd/mapRootRelativePathSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathSimpleSpecifyOutputFile/amd/mapRootRelativePathSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootRelativePathSimpleSpecifyOutputFile/node/mapRootRelativePathSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathSimpleSpecifyOutputFile/node/mapRootRelativePathSimpleSpecifyOutputFile.errors.txt
index dac40e9b915c3..cec00391a2706 100644
--- a/tests/baselines/reference/project/mapRootRelativePathSimpleSpecifyOutputFile/node/mapRootRelativePathSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathSimpleSpecifyOutputFile/node/mapRootRelativePathSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathSingleFileSpecifyOutputFile/amd/mapRootRelativePathSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathSingleFileSpecifyOutputFile/amd/mapRootRelativePathSingleFileSpecifyOutputFile.errors.txt
index e228759a197b5..ce79abb2a79c5 100644
--- a/tests/baselines/reference/project/mapRootRelativePathSingleFileSpecifyOutputFile/amd/mapRootRelativePathSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathSingleFileSpecifyOutputFile/amd/mapRootRelativePathSingleFileSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== test.ts (0 errors) ====
     var a1 = 10;
     class c1 {
diff --git a/tests/baselines/reference/project/mapRootRelativePathSingleFileSpecifyOutputFile/node/mapRootRelativePathSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathSingleFileSpecifyOutputFile/node/mapRootRelativePathSingleFileSpecifyOutputFile.errors.txt
index a3401edd171f3..8030290f6a09d 100644
--- a/tests/baselines/reference/project/mapRootRelativePathSingleFileSpecifyOutputFile/node/mapRootRelativePathSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathSingleFileSpecifyOutputFile/node/mapRootRelativePathSingleFileSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== test.ts (0 errors) ====
     var a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathSubfolderSpecifyOutputFile/amd/mapRootRelativePathSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathSubfolderSpecifyOutputFile/amd/mapRootRelativePathSubfolderSpecifyOutputFile.errors.txt
index abf1877840249..2e1e4f9438ef7 100644
--- a/tests/baselines/reference/project/mapRootRelativePathSubfolderSpecifyOutputFile/amd/mapRootRelativePathSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathSubfolderSpecifyOutputFile/amd/mapRootRelativePathSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootRelativePathSubfolderSpecifyOutputFile/node/mapRootRelativePathSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/mapRootRelativePathSubfolderSpecifyOutputFile/node/mapRootRelativePathSubfolderSpecifyOutputFile.errors.txt
index 906028d54de16..b54ec12445ead 100644
--- a/tests/baselines/reference/project/mapRootRelativePathSubfolderSpecifyOutputFile/node/mapRootRelativePathSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/mapRootRelativePathSubfolderSpecifyOutputFile/node/mapRootRelativePathSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/amd/maprootUrlMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/amd/maprootUrlMixedSubfolderSpecifyOutputFile.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/amd/maprootUrlMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/amd/maprootUrlMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/node/maprootUrlMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/node/maprootUrlMixedSubfolderSpecifyOutputFile.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/node/maprootUrlMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/node/maprootUrlMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/amd/maprootUrlModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/amd/maprootUrlModuleMultifolderSpecifyOutputFile.errors.txt
index 138924ccd44e8..37fa51f273f66 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/amd/maprootUrlModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/amd/maprootUrlModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/node/maprootUrlModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/node/maprootUrlModuleMultifolderSpecifyOutputFile.errors.txt
index 1c7541e7c3b0d..66f7ea7b3a250 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/node/maprootUrlModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/node/maprootUrlModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/amd/maprootUrlModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/amd/maprootUrlModuleSimpleSpecifyOutputFile.errors.txt
index 149618ce17936..3c0d816fe85cc 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/amd/maprootUrlModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/amd/maprootUrlModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/node/maprootUrlModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/node/maprootUrlModuleSimpleSpecifyOutputFile.errors.txt
index be553e6738677..6a7483593d26f 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/node/maprootUrlModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/node/maprootUrlModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/amd/maprootUrlModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/amd/maprootUrlModuleSubfolderSpecifyOutputFile.errors.txt
index 9f6499ceb2aa2..8274ae8907a7b 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/amd/maprootUrlModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/amd/maprootUrlModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/node/maprootUrlModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/node/maprootUrlModuleSubfolderSpecifyOutputFile.errors.txt
index 43eba59e956df..e6b1a69828125 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/node/maprootUrlModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/node/maprootUrlModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlMultifolderSpecifyOutputFile/amd/maprootUrlMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlMultifolderSpecifyOutputFile/amd/maprootUrlMultifolderSpecifyOutputFile.errors.txt
index f099f50146368..0effddb001fce 100644
--- a/tests/baselines/reference/project/maprootUrlMultifolderSpecifyOutputFile/amd/maprootUrlMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlMultifolderSpecifyOutputFile/amd/maprootUrlMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlMultifolderSpecifyOutputFile/node/maprootUrlMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlMultifolderSpecifyOutputFile/node/maprootUrlMultifolderSpecifyOutputFile.errors.txt
index 0a2373c98b3ab..67c1d0220148d 100644
--- a/tests/baselines/reference/project/maprootUrlMultifolderSpecifyOutputFile/node/maprootUrlMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlMultifolderSpecifyOutputFile/node/maprootUrlMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlSimpleSpecifyOutputFile/amd/maprootUrlSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlSimpleSpecifyOutputFile/amd/maprootUrlSimpleSpecifyOutputFile.errors.txt
index bf5258bd2d8ac..8bb337d288045 100644
--- a/tests/baselines/reference/project/maprootUrlSimpleSpecifyOutputFile/amd/maprootUrlSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlSimpleSpecifyOutputFile/amd/maprootUrlSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlSimpleSpecifyOutputFile/node/maprootUrlSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlSimpleSpecifyOutputFile/node/maprootUrlSimpleSpecifyOutputFile.errors.txt
index dac40e9b915c3..cec00391a2706 100644
--- a/tests/baselines/reference/project/maprootUrlSimpleSpecifyOutputFile/node/maprootUrlSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlSimpleSpecifyOutputFile/node/maprootUrlSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlSingleFileSpecifyOutputFile/amd/maprootUrlSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlSingleFileSpecifyOutputFile/amd/maprootUrlSingleFileSpecifyOutputFile.errors.txt
index e228759a197b5..ce79abb2a79c5 100644
--- a/tests/baselines/reference/project/maprootUrlSingleFileSpecifyOutputFile/amd/maprootUrlSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlSingleFileSpecifyOutputFile/amd/maprootUrlSingleFileSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== test.ts (0 errors) ====
     var a1 = 10;
     class c1 {
diff --git a/tests/baselines/reference/project/maprootUrlSingleFileSpecifyOutputFile/node/maprootUrlSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlSingleFileSpecifyOutputFile/node/maprootUrlSingleFileSpecifyOutputFile.errors.txt
index a3401edd171f3..8030290f6a09d 100644
--- a/tests/baselines/reference/project/maprootUrlSingleFileSpecifyOutputFile/node/maprootUrlSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlSingleFileSpecifyOutputFile/node/maprootUrlSingleFileSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== test.ts (0 errors) ====
     var a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlSubfolderSpecifyOutputFile/amd/maprootUrlSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlSubfolderSpecifyOutputFile/amd/maprootUrlSubfolderSpecifyOutputFile.errors.txt
index abf1877840249..2e1e4f9438ef7 100644
--- a/tests/baselines/reference/project/maprootUrlSubfolderSpecifyOutputFile/amd/maprootUrlSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlSubfolderSpecifyOutputFile/amd/maprootUrlSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlSubfolderSpecifyOutputFile/node/maprootUrlSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlSubfolderSpecifyOutputFile/node/maprootUrlSubfolderSpecifyOutputFile.errors.txt
index 906028d54de16..b54ec12445ead 100644
--- a/tests/baselines/reference/project/maprootUrlSubfolderSpecifyOutputFile/node/maprootUrlSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlSubfolderSpecifyOutputFile/node/maprootUrlSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
index 138924ccd44e8..37fa51f273f66 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
index 1c7541e7c3b0d..66f7ea7b3a250 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
index 149618ce17936..3c0d816fe85cc 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
index be553e6738677..6a7483593d26f 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
index 9f6499ceb2aa2..8274ae8907a7b 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
index 43eba59e956df..e6b1a69828125 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile.errors.txt
index f099f50146368..0effddb001fce 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile/node/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile/node/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile.errors.txt
index 0a2373c98b3ab..67c1d0220148d 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile/node/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile/node/maprootUrlsourcerootUrlMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlSimpleSpecifyOutputFile/amd/maprootUrlsourcerootUrlSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlSimpleSpecifyOutputFile/amd/maprootUrlsourcerootUrlSimpleSpecifyOutputFile.errors.txt
index bf5258bd2d8ac..8bb337d288045 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlSimpleSpecifyOutputFile/amd/maprootUrlsourcerootUrlSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlSimpleSpecifyOutputFile/amd/maprootUrlsourcerootUrlSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlSimpleSpecifyOutputFile/node/maprootUrlsourcerootUrlSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlSimpleSpecifyOutputFile/node/maprootUrlsourcerootUrlSimpleSpecifyOutputFile.errors.txt
index dac40e9b915c3..cec00391a2706 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlSimpleSpecifyOutputFile/node/maprootUrlsourcerootUrlSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlSimpleSpecifyOutputFile/node/maprootUrlsourcerootUrlSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile/amd/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile/amd/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile.errors.txt
index e228759a197b5..ce79abb2a79c5 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile/amd/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile/amd/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== test.ts (0 errors) ====
     var a1 = 10;
     class c1 {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile/node/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile/node/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile.errors.txt
index a3401edd171f3..8030290f6a09d 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile/node/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile/node/maprootUrlsourcerootUrlSingleFileSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== test.ts (0 errors) ====
     var a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile.errors.txt
index abf1877840249..2e1e4f9438ef7 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile/amd/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile.errors.txt
index 906028d54de16..b54ec12445ead 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile/node/maprootUrlsourcerootUrlSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/amd/outMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/amd/outMixedSubfolderSpecifyOutputFile.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/amd/outMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/amd/outMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/node/outMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/node/outMixedSubfolderSpecifyOutputFile.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/node/outMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/node/outMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/outMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/outMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/outMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/outMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/outMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/outMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/outMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/outMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/amd/outModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/amd/outModuleMultifolderSpecifyOutputFile.errors.txt
index 138924ccd44e8..37fa51f273f66 100644
--- a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/amd/outModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/amd/outModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/node/outModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/node/outModuleMultifolderSpecifyOutputFile.errors.txt
index 1c7541e7c3b0d..66f7ea7b3a250 100644
--- a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/node/outModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/node/outModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/amd/outModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/amd/outModuleSimpleSpecifyOutputFile.errors.txt
index 149618ce17936..3c0d816fe85cc 100644
--- a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/amd/outModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/amd/outModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/node/outModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/node/outModuleSimpleSpecifyOutputFile.errors.txt
index be553e6738677..6a7483593d26f 100644
--- a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/node/outModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/node/outModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/amd/outModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/amd/outModuleSubfolderSpecifyOutputFile.errors.txt
index 9f6499ceb2aa2..8274ae8907a7b 100644
--- a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/amd/outModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/amd/outModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/node/outModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/node/outModuleSubfolderSpecifyOutputFile.errors.txt
index 43eba59e956df..e6b1a69828125 100644
--- a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/node/outModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/node/outModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/outMultifolderSpecifyOutputFile/amd/outMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outMultifolderSpecifyOutputFile/amd/outMultifolderSpecifyOutputFile.errors.txt
index f099f50146368..0effddb001fce 100644
--- a/tests/baselines/reference/project/outMultifolderSpecifyOutputFile/amd/outMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outMultifolderSpecifyOutputFile/amd/outMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/outMultifolderSpecifyOutputFile/node/outMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outMultifolderSpecifyOutputFile/node/outMultifolderSpecifyOutputFile.errors.txt
index 0a2373c98b3ab..67c1d0220148d 100644
--- a/tests/baselines/reference/project/outMultifolderSpecifyOutputFile/node/outMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outMultifolderSpecifyOutputFile/node/outMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/outSimpleSpecifyOutputFile/amd/outSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outSimpleSpecifyOutputFile/amd/outSimpleSpecifyOutputFile.errors.txt
index bf5258bd2d8ac..8bb337d288045 100644
--- a/tests/baselines/reference/project/outSimpleSpecifyOutputFile/amd/outSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outSimpleSpecifyOutputFile/amd/outSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/outSimpleSpecifyOutputFile/node/outSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outSimpleSpecifyOutputFile/node/outSimpleSpecifyOutputFile.errors.txt
index dac40e9b915c3..cec00391a2706 100644
--- a/tests/baselines/reference/project/outSimpleSpecifyOutputFile/node/outSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outSimpleSpecifyOutputFile/node/outSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/outSingleFileSpecifyOutputFile/amd/outSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outSingleFileSpecifyOutputFile/amd/outSingleFileSpecifyOutputFile.errors.txt
index e228759a197b5..ce79abb2a79c5 100644
--- a/tests/baselines/reference/project/outSingleFileSpecifyOutputFile/amd/outSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outSingleFileSpecifyOutputFile/amd/outSingleFileSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== test.ts (0 errors) ====
     var a1 = 10;
     class c1 {
diff --git a/tests/baselines/reference/project/outSingleFileSpecifyOutputFile/node/outSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outSingleFileSpecifyOutputFile/node/outSingleFileSpecifyOutputFile.errors.txt
index a3401edd171f3..8030290f6a09d 100644
--- a/tests/baselines/reference/project/outSingleFileSpecifyOutputFile/node/outSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outSingleFileSpecifyOutputFile/node/outSingleFileSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== test.ts (0 errors) ====
     var a1 = 10;
diff --git a/tests/baselines/reference/project/outSubfolderSpecifyOutputFile/amd/outSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outSubfolderSpecifyOutputFile/amd/outSubfolderSpecifyOutputFile.errors.txt
index abf1877840249..2e1e4f9438ef7 100644
--- a/tests/baselines/reference/project/outSubfolderSpecifyOutputFile/amd/outSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outSubfolderSpecifyOutputFile/amd/outSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/outSubfolderSpecifyOutputFile/node/outSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/outSubfolderSpecifyOutputFile/node/outSubfolderSpecifyOutputFile.errors.txt
index 906028d54de16..b54ec12445ead 100644
--- a/tests/baselines/reference/project/outSubfolderSpecifyOutputFile/node/outSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/outSubfolderSpecifyOutputFile/node/outSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/prologueEmit/amd/prologueEmit.errors.txt b/tests/baselines/reference/project/prologueEmit/amd/prologueEmit.errors.txt
index 7fd88361ca7de..c25d6eb915c48 100644
--- a/tests/baselines/reference/project/prologueEmit/amd/prologueEmit.errors.txt
+++ b/tests/baselines/reference/project/prologueEmit/amd/prologueEmit.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== globalThisCapture.ts (0 errors) ====
     // Add a lambda to ensure global 'this' capture is triggered
     (()=>this.window);
diff --git a/tests/baselines/reference/project/prologueEmit/node/prologueEmit.errors.txt b/tests/baselines/reference/project/prologueEmit/node/prologueEmit.errors.txt
index c70b671262cc0..7819598111af2 100644
--- a/tests/baselines/reference/project/prologueEmit/node/prologueEmit.errors.txt
+++ b/tests/baselines/reference/project/prologueEmit/node/prologueEmit.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== globalThisCapture.ts (0 errors) ====
     // Add a lambda to ensure global 'this' capture is triggered
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
index 138924ccd44e8..37fa51f273f66 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/node/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/node/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
index 1c7541e7c3b0d..66f7ea7b3a250 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/node/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/node/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
index 149618ce17936..3c0d816fe85cc 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/node/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/node/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
index be553e6738677..6a7483593d26f 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/node/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/node/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
index 9f6499ceb2aa2..8274ae8907a7b 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
index 43eba59e956df..e6b1a69828125 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMultifolderSpecifyOutputFile/amd/sourceRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathMultifolderSpecifyOutputFile/amd/sourceRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
index f099f50146368..0effddb001fce 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMultifolderSpecifyOutputFile/amd/sourceRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMultifolderSpecifyOutputFile/amd/sourceRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMultifolderSpecifyOutputFile/node/sourceRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathMultifolderSpecifyOutputFile/node/sourceRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
index 0a2373c98b3ab..67c1d0220148d 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMultifolderSpecifyOutputFile/node/sourceRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMultifolderSpecifyOutputFile/node/sourceRootAbsolutePathMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathSimpleSpecifyOutputFile/amd/sourceRootAbsolutePathSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathSimpleSpecifyOutputFile/amd/sourceRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
index bf5258bd2d8ac..8bb337d288045 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathSimpleSpecifyOutputFile/amd/sourceRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathSimpleSpecifyOutputFile/amd/sourceRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathSimpleSpecifyOutputFile/node/sourceRootAbsolutePathSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathSimpleSpecifyOutputFile/node/sourceRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
index dac40e9b915c3..cec00391a2706 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathSimpleSpecifyOutputFile/node/sourceRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathSimpleSpecifyOutputFile/node/sourceRootAbsolutePathSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathSingleFileSpecifyOutputFile/amd/sourceRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathSingleFileSpecifyOutputFile/amd/sourceRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
index e228759a197b5..ce79abb2a79c5 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathSingleFileSpecifyOutputFile/amd/sourceRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathSingleFileSpecifyOutputFile/amd/sourceRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== test.ts (0 errors) ====
     var a1 = 10;
     class c1 {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathSingleFileSpecifyOutputFile/node/sourceRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathSingleFileSpecifyOutputFile/node/sourceRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
index a3401edd171f3..8030290f6a09d 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathSingleFileSpecifyOutputFile/node/sourceRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathSingleFileSpecifyOutputFile/node/sourceRootAbsolutePathSingleFileSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== test.ts (0 errors) ====
     var a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
index abf1877840249..2e1e4f9438ef7 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathSubfolderSpecifyOutputFile/amd/sourceRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootAbsolutePathSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
index 906028d54de16..b54ec12445ead 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathSubfolderSpecifyOutputFile/node/sourceRootAbsolutePathSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/amd/sourceRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/amd/sourceRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/amd/sourceRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/amd/sourceRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/node/sourceRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/node/sourceRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/node/sourceRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/node/sourceRootRelativePathMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/amd/sourceRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/amd/sourceRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
index 138924ccd44e8..37fa51f273f66 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/amd/sourceRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/amd/sourceRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/node/sourceRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/node/sourceRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
index 1c7541e7c3b0d..66f7ea7b3a250 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/node/sourceRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/node/sourceRootRelativePathModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/amd/sourceRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/amd/sourceRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
index 149618ce17936..3c0d816fe85cc 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/amd/sourceRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/amd/sourceRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/node/sourceRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/node/sourceRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
index be553e6738677..6a7483593d26f 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/node/sourceRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/node/sourceRootRelativePathModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/amd/sourceRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/amd/sourceRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
index 9f6499ceb2aa2..8274ae8907a7b 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/amd/sourceRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/amd/sourceRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/node/sourceRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/node/sourceRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
index 43eba59e956df..e6b1a69828125 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/node/sourceRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/node/sourceRootRelativePathModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMultifolderSpecifyOutputFile/amd/sourceRootRelativePathMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathMultifolderSpecifyOutputFile/amd/sourceRootRelativePathMultifolderSpecifyOutputFile.errors.txt
index f099f50146368..0effddb001fce 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMultifolderSpecifyOutputFile/amd/sourceRootRelativePathMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathMultifolderSpecifyOutputFile/amd/sourceRootRelativePathMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMultifolderSpecifyOutputFile/node/sourceRootRelativePathMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathMultifolderSpecifyOutputFile/node/sourceRootRelativePathMultifolderSpecifyOutputFile.errors.txt
index 0a2373c98b3ab..67c1d0220148d 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMultifolderSpecifyOutputFile/node/sourceRootRelativePathMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathMultifolderSpecifyOutputFile/node/sourceRootRelativePathMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathSimpleSpecifyOutputFile/amd/sourceRootRelativePathSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathSimpleSpecifyOutputFile/amd/sourceRootRelativePathSimpleSpecifyOutputFile.errors.txt
index bf5258bd2d8ac..8bb337d288045 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathSimpleSpecifyOutputFile/amd/sourceRootRelativePathSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathSimpleSpecifyOutputFile/amd/sourceRootRelativePathSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathSimpleSpecifyOutputFile/node/sourceRootRelativePathSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathSimpleSpecifyOutputFile/node/sourceRootRelativePathSimpleSpecifyOutputFile.errors.txt
index dac40e9b915c3..cec00391a2706 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathSimpleSpecifyOutputFile/node/sourceRootRelativePathSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathSimpleSpecifyOutputFile/node/sourceRootRelativePathSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathSingleFileSpecifyOutputFile/amd/sourceRootRelativePathSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathSingleFileSpecifyOutputFile/amd/sourceRootRelativePathSingleFileSpecifyOutputFile.errors.txt
index e228759a197b5..ce79abb2a79c5 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathSingleFileSpecifyOutputFile/amd/sourceRootRelativePathSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathSingleFileSpecifyOutputFile/amd/sourceRootRelativePathSingleFileSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== test.ts (0 errors) ====
     var a1 = 10;
     class c1 {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathSingleFileSpecifyOutputFile/node/sourceRootRelativePathSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathSingleFileSpecifyOutputFile/node/sourceRootRelativePathSingleFileSpecifyOutputFile.errors.txt
index a3401edd171f3..8030290f6a09d 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathSingleFileSpecifyOutputFile/node/sourceRootRelativePathSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathSingleFileSpecifyOutputFile/node/sourceRootRelativePathSingleFileSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== test.ts (0 errors) ====
     var a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathSubfolderSpecifyOutputFile/amd/sourceRootRelativePathSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathSubfolderSpecifyOutputFile/amd/sourceRootRelativePathSubfolderSpecifyOutputFile.errors.txt
index abf1877840249..2e1e4f9438ef7 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathSubfolderSpecifyOutputFile/amd/sourceRootRelativePathSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathSubfolderSpecifyOutputFile/amd/sourceRootRelativePathSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathSubfolderSpecifyOutputFile/node/sourceRootRelativePathSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourceRootRelativePathSubfolderSpecifyOutputFile/node/sourceRootRelativePathSubfolderSpecifyOutputFile.errors.txt
index 906028d54de16..b54ec12445ead 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathSubfolderSpecifyOutputFile/node/sourceRootRelativePathSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourceRootRelativePathSubfolderSpecifyOutputFile/node/sourceRootRelativePathSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/amd/sourcemapMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/amd/sourcemapMixedSubfolderSpecifyOutputFile.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/amd/sourcemapMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/amd/sourcemapMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/node/sourcemapMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/node/sourcemapMixedSubfolderSpecifyOutputFile.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/node/sourcemapMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/node/sourcemapMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/amd/sourcemapModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/amd/sourcemapModuleMultifolderSpecifyOutputFile.errors.txt
index 138924ccd44e8..37fa51f273f66 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/amd/sourcemapModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/amd/sourcemapModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/node/sourcemapModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/node/sourcemapModuleMultifolderSpecifyOutputFile.errors.txt
index 1c7541e7c3b0d..66f7ea7b3a250 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/node/sourcemapModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/node/sourcemapModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/amd/sourcemapModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/amd/sourcemapModuleSimpleSpecifyOutputFile.errors.txt
index 149618ce17936..3c0d816fe85cc 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/amd/sourcemapModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/amd/sourcemapModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/node/sourcemapModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/node/sourcemapModuleSimpleSpecifyOutputFile.errors.txt
index be553e6738677..6a7483593d26f 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/node/sourcemapModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/node/sourcemapModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/amd/sourcemapModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/amd/sourcemapModuleSubfolderSpecifyOutputFile.errors.txt
index 9f6499ceb2aa2..8274ae8907a7b 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/amd/sourcemapModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/amd/sourcemapModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/node/sourcemapModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/node/sourcemapModuleSubfolderSpecifyOutputFile.errors.txt
index 43eba59e956df..e6b1a69828125 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/node/sourcemapModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/node/sourcemapModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapMultifolderSpecifyOutputFile/amd/sourcemapMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapMultifolderSpecifyOutputFile/amd/sourcemapMultifolderSpecifyOutputFile.errors.txt
index f099f50146368..0effddb001fce 100644
--- a/tests/baselines/reference/project/sourcemapMultifolderSpecifyOutputFile/amd/sourcemapMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapMultifolderSpecifyOutputFile/amd/sourcemapMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcemapMultifolderSpecifyOutputFile/node/sourcemapMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapMultifolderSpecifyOutputFile/node/sourcemapMultifolderSpecifyOutputFile.errors.txt
index 0a2373c98b3ab..67c1d0220148d 100644
--- a/tests/baselines/reference/project/sourcemapMultifolderSpecifyOutputFile/node/sourcemapMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapMultifolderSpecifyOutputFile/node/sourcemapMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapSimpleSpecifyOutputFile/amd/sourcemapSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapSimpleSpecifyOutputFile/amd/sourcemapSimpleSpecifyOutputFile.errors.txt
index bf5258bd2d8ac..8bb337d288045 100644
--- a/tests/baselines/reference/project/sourcemapSimpleSpecifyOutputFile/amd/sourcemapSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapSimpleSpecifyOutputFile/amd/sourcemapSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcemapSimpleSpecifyOutputFile/node/sourcemapSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapSimpleSpecifyOutputFile/node/sourcemapSimpleSpecifyOutputFile.errors.txt
index dac40e9b915c3..cec00391a2706 100644
--- a/tests/baselines/reference/project/sourcemapSimpleSpecifyOutputFile/node/sourcemapSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapSimpleSpecifyOutputFile/node/sourcemapSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapSingleFileSpecifyOutputFile/amd/sourcemapSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapSingleFileSpecifyOutputFile/amd/sourcemapSingleFileSpecifyOutputFile.errors.txt
index e228759a197b5..ce79abb2a79c5 100644
--- a/tests/baselines/reference/project/sourcemapSingleFileSpecifyOutputFile/amd/sourcemapSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapSingleFileSpecifyOutputFile/amd/sourcemapSingleFileSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== test.ts (0 errors) ====
     var a1 = 10;
     class c1 {
diff --git a/tests/baselines/reference/project/sourcemapSingleFileSpecifyOutputFile/node/sourcemapSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapSingleFileSpecifyOutputFile/node/sourcemapSingleFileSpecifyOutputFile.errors.txt
index a3401edd171f3..8030290f6a09d 100644
--- a/tests/baselines/reference/project/sourcemapSingleFileSpecifyOutputFile/node/sourcemapSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapSingleFileSpecifyOutputFile/node/sourcemapSingleFileSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== test.ts (0 errors) ====
     var a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapSubfolderSpecifyOutputFile/amd/sourcemapSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapSubfolderSpecifyOutputFile/amd/sourcemapSubfolderSpecifyOutputFile.errors.txt
index abf1877840249..2e1e4f9438ef7 100644
--- a/tests/baselines/reference/project/sourcemapSubfolderSpecifyOutputFile/amd/sourcemapSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapSubfolderSpecifyOutputFile/amd/sourcemapSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcemapSubfolderSpecifyOutputFile/node/sourcemapSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcemapSubfolderSpecifyOutputFile/node/sourcemapSubfolderSpecifyOutputFile.errors.txt
index 906028d54de16..b54ec12445ead 100644
--- a/tests/baselines/reference/project/sourcemapSubfolderSpecifyOutputFile/node/sourcemapSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcemapSubfolderSpecifyOutputFile/node/sourcemapSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/amd/sourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/amd/sourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/amd/sourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/amd/sourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/node/sourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/node/sourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/node/sourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/node/sourcerootUrlMixedSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 45b0d2cdf50b2..19a05ba9d1ac8 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
index 705335219db40..235fc8477efea 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/node/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/amd/sourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/amd/sourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
index 138924ccd44e8..37fa51f273f66 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/amd/sourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/amd/sourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/node/sourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/node/sourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
index 1c7541e7c3b0d..66f7ea7b3a250 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/node/sourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/node/sourcerootUrlModuleMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/amd/sourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/amd/sourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
index 149618ce17936..3c0d816fe85cc 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/amd/sourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/amd/sourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/node/sourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/node/sourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
index be553e6738677..6a7483593d26f 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/node/sourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/node/sourcerootUrlModuleSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/amd/sourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/amd/sourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
index 9f6499ceb2aa2..8274ae8907a7b 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/amd/sourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/amd/sourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
     export class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/node/sourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/node/sourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
index 43eba59e956df..e6b1a69828125 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/node/sourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/node/sourcerootUrlModuleSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     export var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlMultifolderSpecifyOutputFile/amd/sourcerootUrlMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlMultifolderSpecifyOutputFile/amd/sourcerootUrlMultifolderSpecifyOutputFile.errors.txt
index f099f50146368..0effddb001fce 100644
--- a/tests/baselines/reference/project/sourcerootUrlMultifolderSpecifyOutputFile/amd/sourcerootUrlMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlMultifolderSpecifyOutputFile/amd/sourcerootUrlMultifolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcerootUrlMultifolderSpecifyOutputFile/node/sourcerootUrlMultifolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlMultifolderSpecifyOutputFile/node/sourcerootUrlMultifolderSpecifyOutputFile.errors.txt
index 0a2373c98b3ab..67c1d0220148d 100644
--- a/tests/baselines/reference/project/sourcerootUrlMultifolderSpecifyOutputFile/node/sourcerootUrlMultifolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlMultifolderSpecifyOutputFile/node/sourcerootUrlMultifolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlSimpleSpecifyOutputFile/amd/sourcerootUrlSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlSimpleSpecifyOutputFile/amd/sourcerootUrlSimpleSpecifyOutputFile.errors.txt
index bf5258bd2d8ac..8bb337d288045 100644
--- a/tests/baselines/reference/project/sourcerootUrlSimpleSpecifyOutputFile/amd/sourcerootUrlSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlSimpleSpecifyOutputFile/amd/sourcerootUrlSimpleSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcerootUrlSimpleSpecifyOutputFile/node/sourcerootUrlSimpleSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlSimpleSpecifyOutputFile/node/sourcerootUrlSimpleSpecifyOutputFile.errors.txt
index dac40e9b915c3..cec00391a2706 100644
--- a/tests/baselines/reference/project/sourcerootUrlSimpleSpecifyOutputFile/node/sourcerootUrlSimpleSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlSimpleSpecifyOutputFile/node/sourcerootUrlSimpleSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlSingleFileSpecifyOutputFile/amd/sourcerootUrlSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlSingleFileSpecifyOutputFile/amd/sourcerootUrlSingleFileSpecifyOutputFile.errors.txt
index e228759a197b5..ce79abb2a79c5 100644
--- a/tests/baselines/reference/project/sourcerootUrlSingleFileSpecifyOutputFile/amd/sourcerootUrlSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlSingleFileSpecifyOutputFile/amd/sourcerootUrlSingleFileSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== test.ts (0 errors) ====
     var a1 = 10;
     class c1 {
diff --git a/tests/baselines/reference/project/sourcerootUrlSingleFileSpecifyOutputFile/node/sourcerootUrlSingleFileSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlSingleFileSpecifyOutputFile/node/sourcerootUrlSingleFileSpecifyOutputFile.errors.txt
index a3401edd171f3..8030290f6a09d 100644
--- a/tests/baselines/reference/project/sourcerootUrlSingleFileSpecifyOutputFile/node/sourcerootUrlSingleFileSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlSingleFileSpecifyOutputFile/node/sourcerootUrlSingleFileSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== test.ts (0 errors) ====
     var a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlSubfolderSpecifyOutputFile/amd/sourcerootUrlSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlSubfolderSpecifyOutputFile/amd/sourcerootUrlSubfolderSpecifyOutputFile.errors.txt
index abf1877840249..2e1e4f9438ef7 100644
--- a/tests/baselines/reference/project/sourcerootUrlSubfolderSpecifyOutputFile/amd/sourcerootUrlSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlSubfolderSpecifyOutputFile/amd/sourcerootUrlSubfolderSpecifyOutputFile.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourcerootUrlSubfolderSpecifyOutputFile/node/sourcerootUrlSubfolderSpecifyOutputFile.errors.txt b/tests/baselines/reference/project/sourcerootUrlSubfolderSpecifyOutputFile/node/sourcerootUrlSubfolderSpecifyOutputFile.errors.txt
index 906028d54de16..b54ec12445ead 100644
--- a/tests/baselines/reference/project/sourcerootUrlSubfolderSpecifyOutputFile/node/sourcerootUrlSubfolderSpecifyOutputFile.errors.txt
+++ b/tests/baselines/reference/project/sourcerootUrlSubfolderSpecifyOutputFile/node/sourcerootUrlSubfolderSpecifyOutputFile.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 !!! error TS6082: Only 'amd' and 'system' modules are supported alongside --out.
 ==== ref/m1.ts (0 errors) ====
     var m1_a1 = 10;
diff --git a/tests/baselines/reference/propertyAccessNumericLiterals.errors.txt b/tests/baselines/reference/propertyAccessNumericLiterals.errors.txt
index ee99f73dcf1b8..bcb6f86fd0203 100644
--- a/tests/baselines/reference/propertyAccessNumericLiterals.errors.txt
+++ b/tests/baselines/reference/propertyAccessNumericLiterals.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/expressions/propertyAccess/propertyAccessNumericLiterals.ts (0 errors) ====
     0xffffffff.toString();
     0o01234.toString();
diff --git a/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.errors.txt b/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.errors.txt
index 1761d9d7dfc77..d6ffff0f8a496 100644
--- a/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.errors.txt
+++ b/tests/baselines/reference/signaturesUseJSDocForOptionalParameters.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/jsDocOptionality.js (0 errors) ====
     function MyClass() {
       this.prop = null;
diff --git a/tests/baselines/reference/sourceMap-Comment1.errors.txt b/tests/baselines/reference/sourceMap-Comment1.errors.txt
index d78097773f379..1dbd0137ef593 100644
--- a/tests/baselines/reference/sourceMap-Comment1.errors.txt
+++ b/tests/baselines/reference/sourceMap-Comment1.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/sourceMap-Comment1.ts (0 errors) ====
     // Comment
\ No newline at end of file
diff --git a/tests/baselines/reference/sourceMap-EmptyFile1.errors.txt b/tests/baselines/reference/sourceMap-EmptyFile1.errors.txt
index ac9e2e52a4e22..8fa3baf3ee04f 100644
--- a/tests/baselines/reference/sourceMap-EmptyFile1.errors.txt
+++ b/tests/baselines/reference/sourceMap-EmptyFile1.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/sourceMap-EmptyFile1.ts (0 errors) ====
     
\ No newline at end of file
diff --git a/tests/baselines/reference/sourceMap-InterfacePrecedingVariableDeclaration1.errors.txt b/tests/baselines/reference/sourceMap-InterfacePrecedingVariableDeclaration1.errors.txt
index 35994a97270d6..bdb5ab38fb123 100644
--- a/tests/baselines/reference/sourceMap-InterfacePrecedingVariableDeclaration1.errors.txt
+++ b/tests/baselines/reference/sourceMap-InterfacePrecedingVariableDeclaration1.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/sourceMap-InterfacePrecedingVariableDeclaration1.ts (0 errors) ====
     interface I {}
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/sourceMap-LineBreaks.errors.txt b/tests/baselines/reference/sourceMap-LineBreaks.errors.txt
index 27aa2ef8fec3d..869640d3b2aab 100644
--- a/tests/baselines/reference/sourceMap-LineBreaks.errors.txt
+++ b/tests/baselines/reference/sourceMap-LineBreaks.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/sourceMap-LineBreaks.ts (0 errors) ====
     var endsWithlineSeparator = 10; 
var endsWithParagraphSeparator = 10; 
var endsWithNextLine = 1;…var endsWithLineFeed = 1;
     var endsWithCarriageReturnLineFeed = 1;
diff --git a/tests/baselines/reference/sourceMap-NewLine1.errors.txt b/tests/baselines/reference/sourceMap-NewLine1.errors.txt
index 6cea8235a41c2..8667b40fdda41 100644
--- a/tests/baselines/reference/sourceMap-NewLine1.errors.txt
+++ b/tests/baselines/reference/sourceMap-NewLine1.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/sourceMap-NewLine1.ts (0 errors) ====
     
\ No newline at end of file
diff --git a/tests/baselines/reference/sourceMap-SemiColon1.errors.txt b/tests/baselines/reference/sourceMap-SemiColon1.errors.txt
index ddad68331a8ca..2e1b0950852cd 100644
--- a/tests/baselines/reference/sourceMap-SemiColon1.errors.txt
+++ b/tests/baselines/reference/sourceMap-SemiColon1.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/sourceMap-SemiColon1.ts (0 errors) ====
     ;
     
\ No newline at end of file
diff --git a/tests/baselines/reference/sourceMap-SingleSpace1.errors.txt b/tests/baselines/reference/sourceMap-SingleSpace1.errors.txt
index 5efb2ee390c93..84a6831d36396 100644
--- a/tests/baselines/reference/sourceMap-SingleSpace1.errors.txt
+++ b/tests/baselines/reference/sourceMap-SingleSpace1.errors.txt
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/sourceMap-SingleSpace1.ts (0 errors) ====
      
\ No newline at end of file
diff --git a/tests/baselines/reference/sourceMap-StringLiteralWithNewLine.errors.txt b/tests/baselines/reference/sourceMap-StringLiteralWithNewLine.errors.txt
index 6aa5d90ff8218..1314fed6b9509 100644
--- a/tests/baselines/reference/sourceMap-StringLiteralWithNewLine.errors.txt
+++ b/tests/baselines/reference/sourceMap-StringLiteralWithNewLine.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/sourceMap-StringLiteralWithNewLine.ts (0 errors) ====
     interface Document {
     }
diff --git a/tests/baselines/reference/sourceMapWithCaseSensitiveFileNames.errors.txt b/tests/baselines/reference/sourceMapWithCaseSensitiveFileNames.errors.txt
index 09c9142b89766..d7c75d01ac11b 100644
--- a/tests/baselines/reference/sourceMapWithCaseSensitiveFileNames.errors.txt
+++ b/tests/baselines/reference/sourceMapWithCaseSensitiveFileNames.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/testFiles/app.ts (0 errors) ====
     // Note in the out result we are using same folder name only different in casing
     // Since this is case sensitive, the folders are different and hence the relative paths in sourcemap shouldn't be just app.ts or app2.ts
diff --git a/tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.errors.txt b/tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.errors.txt
index 4ae0bfebaf09b..7e681b7656da4 100644
--- a/tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.errors.txt
+++ b/tests/baselines/reference/sourceMapWithMultipleFilesWithCopyright.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/b.ts (0 errors) ====
     /*--------------------------------------------------------------------------
     Copyright 
diff --git a/tests/baselines/reference/sourceMapWithMultipleFilesWithFileEndingWithInterface.errors.txt b/tests/baselines/reference/sourceMapWithMultipleFilesWithFileEndingWithInterface.errors.txt
index 4adf73858fb2b..f19322d9fb168 100644
--- a/tests/baselines/reference/sourceMapWithMultipleFilesWithFileEndingWithInterface.errors.txt
+++ b/tests/baselines/reference/sourceMapWithMultipleFilesWithFileEndingWithInterface.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     module M {
         export var X = 1;
diff --git a/tests/baselines/reference/sourceMapWithNonCaseSensitiveFileNames.errors.txt b/tests/baselines/reference/sourceMapWithNonCaseSensitiveFileNames.errors.txt
index 86dd28c61ec38..b76ab7fe9d86d 100644
--- a/tests/baselines/reference/sourceMapWithNonCaseSensitiveFileNames.errors.txt
+++ b/tests/baselines/reference/sourceMapWithNonCaseSensitiveFileNames.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/compiler/testFiles/app.ts (0 errors) ====
     // Note in the out result we are using same folder name only different in casing
     // Since this is non case sensitive, the relative paths should be just app.ts and app2.ts in the sourcemap
diff --git a/tests/baselines/reference/taggedTemplateStringsWithCurriedFunction.errors.txt b/tests/baselines/reference/taggedTemplateStringsWithCurriedFunction.errors.txt
index b701c0b1bde9d..c9da008201c8c 100644
--- a/tests/baselines/reference/taggedTemplateStringsWithCurriedFunction.errors.txt
+++ b/tests/baselines/reference/taggedTemplateStringsWithCurriedFunction.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/taggedTemplateStringsWithCurriedFunction.ts (0 errors) ====
     // Originated from #38558
     
diff --git a/tests/baselines/reference/topLevelThisAssignment.errors.txt b/tests/baselines/reference/topLevelThisAssignment.errors.txt
index b1abf244eb16d..275b4cbaabebe 100644
--- a/tests/baselines/reference/topLevelThisAssignment.errors.txt
+++ b/tests/baselines/reference/topLevelThisAssignment.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/salsa/a.js (0 errors) ====
     this.a = 10;
     this.a;
diff --git a/tests/baselines/reference/trailingCommasES3.errors.txt b/tests/baselines/reference/trailingCommasES3.errors.txt
index 3965a75d3d083..a4cf4b6d22fe5 100644
--- a/tests/baselines/reference/trailingCommasES3.errors.txt
+++ b/tests/baselines/reference/trailingCommasES3.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/compiler/trailingCommasES3.ts (0 errors) ====
     var o1 = { a: 1, b: 2 };
     var o2 = { a: 1, b: 2, };
diff --git a/tests/baselines/reference/transpile/Does not generate semantic diagnostics.errors.txt b/tests/baselines/reference/transpile/Does not generate semantic diagnostics.errors.txt
index a88dc4e6e9f0a..48e2c35e4443f 100644
--- a/tests/baselines/reference/transpile/Does not generate semantic diagnostics.errors.txt	
+++ b/tests/baselines/reference/transpile/Does not generate semantic diagnostics.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x: string = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Does not generate semantic diagnostics.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Does not generate semantic diagnostics.oldTranspile.errors.txt
index a88dc4e6e9f0a..48e2c35e4443f 100644
--- a/tests/baselines/reference/transpile/Does not generate semantic diagnostics.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Does not generate semantic diagnostics.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x: string = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Elides import equals referenced only by export type.errors.txt b/tests/baselines/reference/transpile/Elides import equals referenced only by export type.errors.txt
index 067bbacaf9e13..446d224f1ce3d 100644
--- a/tests/baselines/reference/transpile/Elides import equals referenced only by export type.errors.txt	
+++ b/tests/baselines/reference/transpile/Elides import equals referenced only by export type.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     import IFoo = Namespace.IFoo;export type { IFoo };
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Elides import equals referenced only by export type.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Elides import equals referenced only by export type.oldTranspile.errors.txt
index 067bbacaf9e13..446d224f1ce3d 100644
--- a/tests/baselines/reference/transpile/Elides import equals referenced only by export type.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Elides import equals referenced only by export type.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     import IFoo = Namespace.IFoo;export type { IFoo };
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Elides import equals referenced only by type only export specifier.errors.txt b/tests/baselines/reference/transpile/Elides import equals referenced only by type only export specifier.errors.txt
index dda58fe23e5d5..4f2320c9c4e04 100644
--- a/tests/baselines/reference/transpile/Elides import equals referenced only by type only export specifier.errors.txt	
+++ b/tests/baselines/reference/transpile/Elides import equals referenced only by type only export specifier.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     import IFoo = Namespace.IFoo;export { type IFoo };
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Elides import equals referenced only by type only export specifier.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Elides import equals referenced only by type only export specifier.oldTranspile.errors.txt
index dda58fe23e5d5..4f2320c9c4e04 100644
--- a/tests/baselines/reference/transpile/Elides import equals referenced only by type only export specifier.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Elides import equals referenced only by type only export specifier.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     import IFoo = Namespace.IFoo;export { type IFoo };
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Export star as ns conflict does not crash.errors.txt b/tests/baselines/reference/transpile/Export star as ns conflict does not crash.errors.txt
index 8171331057ce4..5d165a9e5cb32 100644
--- a/tests/baselines/reference/transpile/Export star as ns conflict does not crash.errors.txt	
+++ b/tests/baselines/reference/transpile/Export star as ns conflict does not crash.errors.txt	
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     
     var a;
diff --git a/tests/baselines/reference/transpile/Export star as ns conflict does not crash.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Export star as ns conflict does not crash.oldTranspile.errors.txt
index 8171331057ce4..5d165a9e5cb32 100644
--- a/tests/baselines/reference/transpile/Export star as ns conflict does not crash.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Export star as ns conflict does not crash.oldTranspile.errors.txt	
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     
     var a;
diff --git a/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.errors.txt b/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.errors.txt
index 62b9c50bad901..cb892b6e4312d 100644
--- a/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 file.ts(1,1): error TS1434: Unexpected keyword or identifier.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (1 errors) ====
     a b
     ~
diff --git a/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.oldTranspile.errors.txt
index 62b9c50bad901..cb892b6e4312d 100644
--- a/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.oldTranspile.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 file.ts(1,1): error TS1434: Unexpected keyword or identifier.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (1 errors) ====
     a b
     ~
diff --git a/tests/baselines/reference/transpile/Generates module output.errors.txt b/tests/baselines/reference/transpile/Generates module output.errors.txt
index fef912219ef6c..5b06d0efa56ec 100644
--- a/tests/baselines/reference/transpile/Generates module output.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates module output.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates module output.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Generates module output.oldTranspile.errors.txt
index fef912219ef6c..5b06d0efa56ec 100644
--- a/tests/baselines/reference/transpile/Generates module output.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates module output.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.errors.txt b/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.errors.txt
index 861ab2e8924bd..9af2d50b93057 100644
--- a/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.errors.txt	
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     /// <reference path="file2.ts" />
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.oldTranspile.errors.txt
index 861ab2e8924bd..9af2d50b93057 100644
--- a/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.oldTranspile.errors.txt	
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     /// <reference path="file2.ts" />
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.errors.txt b/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.errors.txt
index 88fe5b6c54176..5088820790e6a 100644
--- a/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     import {a} from "module2";
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.oldTranspile.errors.txt
index 88fe5b6c54176..5088820790e6a 100644
--- a/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     import {a} from "module2";
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.errors.txt b/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.errors.txt
index fef912219ef6c..5b06d0efa56ec 100644
--- a/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.oldTranspile.errors.txt
index fef912219ef6c..5b06d0efa56ec 100644
--- a/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Infer correct file extension.errors.txt b/tests/baselines/reference/transpile/Infer correct file extension.errors.txt
index 6535984b1a2bb..2dbc7833f54af 100644
--- a/tests/baselines/reference/transpile/Infer correct file extension.errors.txt	
+++ b/tests/baselines/reference/transpile/Infer correct file extension.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     const fn = <T>(a: T) => a
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Infer correct file extension.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Infer correct file extension.oldTranspile.errors.txt
index 6535984b1a2bb..2dbc7833f54af 100644
--- a/tests/baselines/reference/transpile/Infer correct file extension.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Infer correct file extension.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     const fn = <T>(a: T) => a
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/No extra errors for file without extension.errors.txt b/tests/baselines/reference/transpile/No extra errors for file without extension.errors.txt
index 2d8cddf9f0d2d..00d0f6d0d9b9b 100644
--- a/tests/baselines/reference/transpile/No extra errors for file without extension.errors.txt	
+++ b/tests/baselines/reference/transpile/No extra errors for file without extension.errors.txt	
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file (0 errors) ====
     "use strict";
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/No extra errors for file without extension.oldTranspile.errors.txt b/tests/baselines/reference/transpile/No extra errors for file without extension.oldTranspile.errors.txt
index 2d8cddf9f0d2d..00d0f6d0d9b9b 100644
--- a/tests/baselines/reference/transpile/No extra errors for file without extension.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/No extra errors for file without extension.oldTranspile.errors.txt	
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file (0 errors) ====
     "use strict";
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Rename dependencies - AMD.errors.txt b/tests/baselines/reference/transpile/Rename dependencies - AMD.errors.txt
index 7764253ba9a9b..e39ca9344d5f1 100644
--- a/tests/baselines/reference/transpile/Rename dependencies - AMD.errors.txt	
+++ b/tests/baselines/reference/transpile/Rename dependencies - AMD.errors.txt	
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     import {foo} from "SomeName";
     declare function use(a: any);
diff --git a/tests/baselines/reference/transpile/Rename dependencies - System.errors.txt b/tests/baselines/reference/transpile/Rename dependencies - System.errors.txt
index 7764253ba9a9b..e39ca9344d5f1 100644
--- a/tests/baselines/reference/transpile/Rename dependencies - System.errors.txt	
+++ b/tests/baselines/reference/transpile/Rename dependencies - System.errors.txt	
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     import {foo} from "SomeName";
     declare function use(a: any);
diff --git a/tests/baselines/reference/transpile/Rename dependencies - UMD.errors.txt b/tests/baselines/reference/transpile/Rename dependencies - UMD.errors.txt
index 7764253ba9a9b..e39ca9344d5f1 100644
--- a/tests/baselines/reference/transpile/Rename dependencies - UMD.errors.txt	
+++ b/tests/baselines/reference/transpile/Rename dependencies - UMD.errors.txt	
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     import {foo} from "SomeName";
     declare function use(a: any);
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.errors.txt b/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.errors.txt
index e30f175a4c2cb..fad550d1d91ac 100644
--- a/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.errors.txt	
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
 ==== file.ts (0 errors) ====
     
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.oldTranspile.errors.txt
index e30f175a4c2cb..fad550d1d91ac 100644
--- a/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.oldTranspile.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
 ==== file.ts (0 errors) ====
     
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.errors.txt b/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.errors.txt
index e30f175a4c2cb..fad550d1d91ac 100644
--- a/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.errors.txt	
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
 ==== file.ts (0 errors) ====
     
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.oldTranspile.errors.txt
index e30f175a4c2cb..fad550d1d91ac 100644
--- a/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.oldTranspile.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS6046: Argument for '--module' option must be: 'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015', 'es2020', 'es2022', 'esnext', 'node16', 'nodenext'.
 ==== file.ts (0 errors) ====
     
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Sets module name.errors.txt b/tests/baselines/reference/transpile/Sets module name.errors.txt
index e39e25e9c4548..806012c63fa83 100644
--- a/tests/baselines/reference/transpile/Sets module name.errors.txt	
+++ b/tests/baselines/reference/transpile/Sets module name.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x = 1;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Sets module name.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Sets module name.oldTranspile.errors.txt
index e39e25e9c4548..806012c63fa83 100644
--- a/tests/baselines/reference/transpile/Sets module name.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Sets module name.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x = 1;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Support options with lib values.errors.txt b/tests/baselines/reference/transpile/Support options with lib values.errors.txt
index 4ea3259d69bd7..dc710829d5256 100644
--- a/tests/baselines/reference/transpile/Support options with lib values.errors.txt	
+++ b/tests/baselines/reference/transpile/Support options with lib values.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     const a = 10;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Support options with lib values.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Support options with lib values.oldTranspile.errors.txt
index 4ea3259d69bd7..dc710829d5256 100644
--- a/tests/baselines/reference/transpile/Support options with lib values.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Support options with lib values.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     const a = 10;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Support options with types values.errors.txt b/tests/baselines/reference/transpile/Support options with types values.errors.txt
index 4ea3259d69bd7..dc710829d5256 100644
--- a/tests/baselines/reference/transpile/Support options with types values.errors.txt	
+++ b/tests/baselines/reference/transpile/Support options with types values.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     const a = 10;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Support options with types values.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Support options with types values.oldTranspile.errors.txt
index 4ea3259d69bd7..dc710829d5256 100644
--- a/tests/baselines/reference/transpile/Support options with types values.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Support options with types values.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     const a = 10;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports as const arrays.errors.txt b/tests/baselines/reference/transpile/Supports as const arrays.errors.txt
index 644b1221ae35e..07ca9ddfed490 100644
--- a/tests/baselines/reference/transpile/Supports as const arrays.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports as const arrays.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     ([] as const).forEach(k => console.log(k));
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports as const arrays.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports as const arrays.oldTranspile.errors.txt
index 644b1221ae35e..07ca9ddfed490 100644
--- a/tests/baselines/reference/transpile/Supports as const arrays.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports as const arrays.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     ([] as const).forEach(k => console.log(k));
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports backslashes in file name.errors.txt b/tests/baselines/reference/transpile/Supports backslashes in file name.errors.txt
index a776d50210c00..42af06f8d33d1 100644
--- a/tests/baselines/reference/transpile/Supports backslashes in file name.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports backslashes in file name.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== a\b.ts (0 errors) ====
     var x
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports backslashes in file name.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports backslashes in file name.oldTranspile.errors.txt
index a776d50210c00..42af06f8d33d1 100644
--- a/tests/baselines/reference/transpile/Supports backslashes in file name.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports backslashes in file name.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== a\b.ts (0 errors) ====
     var x
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports readonly keyword for arrays.errors.txt b/tests/baselines/reference/transpile/Supports readonly keyword for arrays.errors.txt
index c9e88c7beb3b6..36495a53372d3 100644
--- a/tests/baselines/reference/transpile/Supports readonly keyword for arrays.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports readonly keyword for arrays.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     let x: readonly string[];
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports readonly keyword for arrays.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports readonly keyword for arrays.oldTranspile.errors.txt
index c9e88c7beb3b6..36495a53372d3 100644
--- a/tests/baselines/reference/transpile/Supports readonly keyword for arrays.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports readonly keyword for arrays.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     let x: readonly string[];
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting allowJs.errors.txt b/tests/baselines/reference/transpile/Supports setting allowJs.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting allowJs.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting allowJs.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting allowJs.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting allowJs.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting allowJs.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting allowJs.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting allowSyntheticDefaultImports.errors.txt b/tests/baselines/reference/transpile/Supports setting allowSyntheticDefaultImports.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting allowSyntheticDefaultImports.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting allowSyntheticDefaultImports.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting allowSyntheticDefaultImports.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting allowSyntheticDefaultImports.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting allowSyntheticDefaultImports.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting allowSyntheticDefaultImports.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting allowUnreachableCode.errors.txt b/tests/baselines/reference/transpile/Supports setting allowUnreachableCode.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting allowUnreachableCode.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting allowUnreachableCode.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting allowUnreachableCode.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting allowUnreachableCode.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting allowUnreachableCode.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting allowUnreachableCode.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting allowUnusedLabels.errors.txt b/tests/baselines/reference/transpile/Supports setting allowUnusedLabels.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting allowUnusedLabels.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting allowUnusedLabels.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting allowUnusedLabels.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting allowUnusedLabels.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting allowUnusedLabels.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting allowUnusedLabels.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting alwaysStrict.errors.txt b/tests/baselines/reference/transpile/Supports setting alwaysStrict.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting alwaysStrict.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting alwaysStrict.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting alwaysStrict.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting alwaysStrict.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting alwaysStrict.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting alwaysStrict.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting baseUrl.errors.txt b/tests/baselines/reference/transpile/Supports setting baseUrl.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting baseUrl.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting baseUrl.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting baseUrl.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting baseUrl.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting baseUrl.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting baseUrl.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting charset.errors.txt b/tests/baselines/reference/transpile/Supports setting charset.errors.txt
index 4e134f442adea..d0357734678dd 100644
--- a/tests/baselines/reference/transpile/Supports setting charset.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting charset.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting charset.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting charset.oldTranspile.errors.txt
index 4e134f442adea..d0357734678dd 100644
--- a/tests/baselines/reference/transpile/Supports setting charset.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting charset.oldTranspile.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'charset' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting composite.errors.txt b/tests/baselines/reference/transpile/Supports setting composite.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting composite.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting composite.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting composite.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting composite.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting composite.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting composite.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting declaration.errors.txt b/tests/baselines/reference/transpile/Supports setting declaration.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting declaration.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting declaration.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting declaration.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting declaration.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting declaration.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting declaration.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting declarationDir.errors.txt b/tests/baselines/reference/transpile/Supports setting declarationDir.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting declarationDir.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting declarationDir.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting declarationDir.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting declarationDir.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting declarationDir.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting declarationDir.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting emitBOM.errors.txt b/tests/baselines/reference/transpile/Supports setting emitBOM.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting emitBOM.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting emitBOM.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting emitBOM.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting emitBOM.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting emitBOM.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting emitBOM.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting emitDecoratorMetadata.errors.txt b/tests/baselines/reference/transpile/Supports setting emitDecoratorMetadata.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting emitDecoratorMetadata.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting emitDecoratorMetadata.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting emitDecoratorMetadata.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting emitDecoratorMetadata.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting emitDecoratorMetadata.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting emitDecoratorMetadata.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting experimentalDecorators.errors.txt b/tests/baselines/reference/transpile/Supports setting experimentalDecorators.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting experimentalDecorators.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting experimentalDecorators.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting experimentalDecorators.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting experimentalDecorators.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting experimentalDecorators.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting experimentalDecorators.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting forceConsistentCasingInFileNames.errors.txt b/tests/baselines/reference/transpile/Supports setting forceConsistentCasingInFileNames.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting forceConsistentCasingInFileNames.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting forceConsistentCasingInFileNames.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting forceConsistentCasingInFileNames.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting forceConsistentCasingInFileNames.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting forceConsistentCasingInFileNames.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting forceConsistentCasingInFileNames.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting incremental.errors.txt b/tests/baselines/reference/transpile/Supports setting incremental.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting incremental.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting incremental.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting incremental.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting incremental.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting incremental.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting incremental.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting isolatedModules.errors.txt b/tests/baselines/reference/transpile/Supports setting isolatedModules.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting isolatedModules.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting isolatedModules.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting isolatedModules.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting isolatedModules.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting isolatedModules.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting isolatedModules.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting jsx.errors.txt b/tests/baselines/reference/transpile/Supports setting jsx.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting jsx.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting jsx.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting jsx.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting jsx.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting jsx.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting jsx.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting jsxFactory.errors.txt b/tests/baselines/reference/transpile/Supports setting jsxFactory.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting jsxFactory.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting jsxFactory.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting jsxFactory.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting jsxFactory.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting jsxFactory.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting jsxFactory.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting jsxFragmentFactory.errors.txt b/tests/baselines/reference/transpile/Supports setting jsxFragmentFactory.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting jsxFragmentFactory.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting jsxFragmentFactory.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting jsxFragmentFactory.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting jsxFragmentFactory.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting jsxFragmentFactory.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting jsxFragmentFactory.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting lib.errors.txt b/tests/baselines/reference/transpile/Supports setting lib.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting lib.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting lib.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting lib.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting lib.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting lib.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting lib.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting locale.errors.txt b/tests/baselines/reference/transpile/Supports setting locale.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting locale.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting locale.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting locale.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting locale.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting locale.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting locale.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting module.errors.txt b/tests/baselines/reference/transpile/Supports setting module.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting module.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting module.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting module.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting module.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting module.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting module.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting moduleResolution.errors.txt b/tests/baselines/reference/transpile/Supports setting moduleResolution.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting moduleResolution.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting moduleResolution.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting moduleResolution.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting moduleResolution.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting moduleResolution.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting moduleResolution.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting newLine.errors.txt b/tests/baselines/reference/transpile/Supports setting newLine.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting newLine.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting newLine.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting newLine.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting newLine.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting newLine.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting newLine.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noEmit.errors.txt b/tests/baselines/reference/transpile/Supports setting noEmit.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noEmit.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noEmit.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noEmit.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noEmit.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noEmit.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noEmit.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noEmitHelpers.errors.txt b/tests/baselines/reference/transpile/Supports setting noEmitHelpers.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noEmitHelpers.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noEmitHelpers.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noEmitHelpers.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noEmitHelpers.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noEmitHelpers.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noEmitHelpers.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noEmitOnError.errors.txt b/tests/baselines/reference/transpile/Supports setting noEmitOnError.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noEmitOnError.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noEmitOnError.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noEmitOnError.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noEmitOnError.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noEmitOnError.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noEmitOnError.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noErrorTruncation.errors.txt b/tests/baselines/reference/transpile/Supports setting noErrorTruncation.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noErrorTruncation.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noErrorTruncation.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noErrorTruncation.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noErrorTruncation.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noErrorTruncation.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noErrorTruncation.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noFallthroughCasesInSwitch.errors.txt b/tests/baselines/reference/transpile/Supports setting noFallthroughCasesInSwitch.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noFallthroughCasesInSwitch.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noFallthroughCasesInSwitch.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noFallthroughCasesInSwitch.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noFallthroughCasesInSwitch.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noFallthroughCasesInSwitch.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noFallthroughCasesInSwitch.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noImplicitAny.errors.txt b/tests/baselines/reference/transpile/Supports setting noImplicitAny.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noImplicitAny.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noImplicitAny.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noImplicitAny.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noImplicitAny.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noImplicitAny.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noImplicitAny.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noImplicitReturns.errors.txt b/tests/baselines/reference/transpile/Supports setting noImplicitReturns.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noImplicitReturns.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noImplicitReturns.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noImplicitReturns.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noImplicitReturns.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noImplicitReturns.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noImplicitReturns.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noImplicitThis.errors.txt b/tests/baselines/reference/transpile/Supports setting noImplicitThis.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noImplicitThis.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noImplicitThis.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noImplicitThis.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noImplicitThis.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noImplicitThis.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noImplicitThis.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noImplicitUseStrict.errors.txt b/tests/baselines/reference/transpile/Supports setting noImplicitUseStrict.errors.txt
index a77880cac0fdd..d018d9ffb97c7 100644
--- a/tests/baselines/reference/transpile/Supports setting noImplicitUseStrict.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noImplicitUseStrict.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noImplicitUseStrict.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noImplicitUseStrict.oldTranspile.errors.txt
index a77880cac0fdd..d018d9ffb97c7 100644
--- a/tests/baselines/reference/transpile/Supports setting noImplicitUseStrict.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noImplicitUseStrict.oldTranspile.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'noImplicitUseStrict' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noLib.errors.txt b/tests/baselines/reference/transpile/Supports setting noLib.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noLib.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noLib.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noLib.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noLib.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noLib.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noLib.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noResolve.errors.txt b/tests/baselines/reference/transpile/Supports setting noResolve.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noResolve.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noResolve.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting noResolve.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting noResolve.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting noResolve.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting noResolve.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting out.errors.txt b/tests/baselines/reference/transpile/Supports setting out.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting out.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting out.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting out.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting out.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting out.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting out.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting outDir.errors.txt b/tests/baselines/reference/transpile/Supports setting outDir.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting outDir.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting outDir.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting outDir.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting outDir.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting outDir.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting outDir.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting outFile.errors.txt b/tests/baselines/reference/transpile/Supports setting outFile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting outFile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting outFile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting outFile.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting outFile.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting outFile.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting outFile.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting paths.errors.txt b/tests/baselines/reference/transpile/Supports setting paths.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting paths.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting paths.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting paths.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting paths.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting paths.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting paths.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting preserveConstEnums.errors.txt b/tests/baselines/reference/transpile/Supports setting preserveConstEnums.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting preserveConstEnums.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting preserveConstEnums.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting preserveConstEnums.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting preserveConstEnums.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting preserveConstEnums.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting preserveConstEnums.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting reactNamespace.errors.txt b/tests/baselines/reference/transpile/Supports setting reactNamespace.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting reactNamespace.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting reactNamespace.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting reactNamespace.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting reactNamespace.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting reactNamespace.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting reactNamespace.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting removeComments.errors.txt b/tests/baselines/reference/transpile/Supports setting removeComments.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting removeComments.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting removeComments.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting removeComments.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting removeComments.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting removeComments.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting removeComments.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting rootDir.errors.txt b/tests/baselines/reference/transpile/Supports setting rootDir.errors.txt
index f97a5251277a1..aabde4cab2729 100644
--- a/tests/baselines/reference/transpile/Supports setting rootDir.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting rootDir.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== ./rootDir/input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting rootDir.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting rootDir.oldTranspile.errors.txt
index f97a5251277a1..aabde4cab2729 100644
--- a/tests/baselines/reference/transpile/Supports setting rootDir.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting rootDir.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== ./rootDir/input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting rootDirs.errors.txt b/tests/baselines/reference/transpile/Supports setting rootDirs.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting rootDirs.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting rootDirs.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting rootDirs.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting rootDirs.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting rootDirs.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting rootDirs.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting skipDefaultLibCheck.errors.txt b/tests/baselines/reference/transpile/Supports setting skipDefaultLibCheck.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting skipDefaultLibCheck.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting skipDefaultLibCheck.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting skipDefaultLibCheck.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting skipDefaultLibCheck.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting skipDefaultLibCheck.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting skipDefaultLibCheck.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting skipLibCheck.errors.txt b/tests/baselines/reference/transpile/Supports setting skipLibCheck.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting skipLibCheck.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting skipLibCheck.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting skipLibCheck.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting skipLibCheck.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting skipLibCheck.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting skipLibCheck.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting strictNullChecks.errors.txt b/tests/baselines/reference/transpile/Supports setting strictNullChecks.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting strictNullChecks.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting strictNullChecks.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting strictNullChecks.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting strictNullChecks.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting strictNullChecks.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting strictNullChecks.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting stripInternal.errors.txt b/tests/baselines/reference/transpile/Supports setting stripInternal.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting stripInternal.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting stripInternal.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting stripInternal.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting stripInternal.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting stripInternal.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting stripInternal.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting suppressExcessPropertyErrors.errors.txt b/tests/baselines/reference/transpile/Supports setting suppressExcessPropertyErrors.errors.txt
index a10da5dbc090f..a33a5c24a1bcd 100644
--- a/tests/baselines/reference/transpile/Supports setting suppressExcessPropertyErrors.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting suppressExcessPropertyErrors.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting suppressExcessPropertyErrors.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting suppressExcessPropertyErrors.oldTranspile.errors.txt
index a10da5dbc090f..a33a5c24a1bcd 100644
--- a/tests/baselines/reference/transpile/Supports setting suppressExcessPropertyErrors.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting suppressExcessPropertyErrors.oldTranspile.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'suppressExcessPropertyErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting suppressImplicitAnyIndexErrors.errors.txt b/tests/baselines/reference/transpile/Supports setting suppressImplicitAnyIndexErrors.errors.txt
index c980445b64b00..f9ea56e463d40 100644
--- a/tests/baselines/reference/transpile/Supports setting suppressImplicitAnyIndexErrors.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting suppressImplicitAnyIndexErrors.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting suppressImplicitAnyIndexErrors.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting suppressImplicitAnyIndexErrors.oldTranspile.errors.txt
index c980445b64b00..f9ea56e463d40 100644
--- a/tests/baselines/reference/transpile/Supports setting suppressImplicitAnyIndexErrors.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting suppressImplicitAnyIndexErrors.oldTranspile.errors.txt	
@@ -1,8 +1,8 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
-!!! error TS5101: Flag 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'suppressImplicitAnyIndexErrors' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting tsbuildinfo.errors.txt b/tests/baselines/reference/transpile/Supports setting tsbuildinfo.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting tsbuildinfo.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting tsbuildinfo.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting tsbuildinfo.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting tsbuildinfo.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting tsbuildinfo.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting tsbuildinfo.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting typeRoots.errors.txt b/tests/baselines/reference/transpile/Supports setting typeRoots.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting typeRoots.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting typeRoots.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting typeRoots.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting typeRoots.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting typeRoots.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting typeRoots.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting types.errors.txt b/tests/baselines/reference/transpile/Supports setting types.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting types.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting types.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports setting types.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports setting types.oldTranspile.errors.txt
index 66bb42584d88b..3d6bff97de1a3 100644
--- a/tests/baselines/reference/transpile/Supports setting types.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports setting types.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     x;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports urls in file name.errors.txt b/tests/baselines/reference/transpile/Supports urls in file name.errors.txt
index cf788253f5a7e..25e154f9af082 100644
--- a/tests/baselines/reference/transpile/Supports urls in file name.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports urls in file name.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== http://somewhere/directory//directory2/file.ts (0 errors) ====
     var x
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports urls in file name.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Supports urls in file name.oldTranspile.errors.txt
index cf788253f5a7e..25e154f9af082 100644
--- a/tests/baselines/reference/transpile/Supports urls in file name.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Supports urls in file name.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== http://somewhere/directory//directory2/file.ts (0 errors) ====
     var x
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Uses correct newLine character.errors.txt b/tests/baselines/reference/transpile/Uses correct newLine character.errors.txt
index fef912219ef6c..5b06d0efa56ec 100644
--- a/tests/baselines/reference/transpile/Uses correct newLine character.errors.txt	
+++ b/tests/baselines/reference/transpile/Uses correct newLine character.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Uses correct newLine character.oldTranspile.errors.txt b/tests/baselines/reference/transpile/Uses correct newLine character.oldTranspile.errors.txt
index fef912219ef6c..5b06d0efa56ec 100644
--- a/tests/baselines/reference/transpile/Uses correct newLine character.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/Uses correct newLine character.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.ts (0 errors) ====
     var x = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/transpile .js files.errors.txt b/tests/baselines/reference/transpile/transpile .js files.errors.txt
index 4ea3259d69bd7..dc710829d5256 100644
--- a/tests/baselines/reference/transpile/transpile .js files.errors.txt	
+++ b/tests/baselines/reference/transpile/transpile .js files.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     const a = 10;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/transpile .js files.oldTranspile.errors.txt b/tests/baselines/reference/transpile/transpile .js files.oldTranspile.errors.txt
index 4ea3259d69bd7..dc710829d5256 100644
--- a/tests/baselines/reference/transpile/transpile .js files.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/transpile .js files.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== input.js (0 errors) ====
     const a = 10;
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.errors.txt b/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.errors.txt
index 3af45aefbbd96..391f2a206dc69 100644
--- a/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.errors.txt	
+++ b/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.tsx (0 errors) ====
     var x = <div/>
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.oldTranspile.errors.txt b/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.oldTranspile.errors.txt
index 3af45aefbbd96..391f2a206dc69 100644
--- a/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.oldTranspile.errors.txt	
+++ b/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.oldTranspile.errors.txt	
@@ -1,6 +1,6 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== file.tsx (0 errors) ====
     var x = <div/>
\ No newline at end of file
diff --git a/tests/baselines/reference/tsbuild/amdModulesWithOut/prepend-reports-deprecation-error.js b/tests/baselines/reference/tsbuild/amdModulesWithOut/prepend-reports-deprecation-error.js
index 1d60459c56461..b169015e317bf 100644
--- a/tests/baselines/reference/tsbuild/amdModulesWithOut/prepend-reports-deprecation-error.js
+++ b/tests/baselines/reference/tsbuild/amdModulesWithOut/prepend-reports-deprecation-error.js
@@ -82,7 +82,7 @@ Output::
 
 [12:00:19 AM] Building project '/src/app/tsconfig.json'...
 
-src/app/tsconfig.json:14:9 - error TS5101: Flag 'prepend' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+src/app/tsconfig.json:14:9 - error TS5101: Option 'prepend' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 14         { "path": "../lib", "prepend": true }
            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -500,7 +500,7 @@ Output::
 
 [12:00:34 AM] Building project '/src/app/tsconfig.json'...
 
-src/app/tsconfig.json:14:9 - error TS5101: Flag 'prepend' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+src/app/tsconfig.json:14:9 - error TS5101: Option 'prepend' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 14         { "path": "../lib", "prepend": true }
            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/tsbuild/sample1/can-detect-when-and-what-to-rebuild.js b/tests/baselines/reference/tsbuild/sample1/can-detect-when-and-what-to-rebuild.js
index fef3b35abf3a7..2836e021ed9e3 100644
--- a/tests/baselines/reference/tsbuild/sample1/can-detect-when-and-what-to-rebuild.js
+++ b/tests/baselines/reference/tsbuild/sample1/can-detect-when-and-what-to-rebuild.js
@@ -714,7 +714,7 @@ Output::
 
 [12:01:03 AM] Building project '/src/tests/tsconfig.json'...
 
-src/tests/tsconfig.json:8:38 - error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+src/tests/tsconfig.json:8:38 - error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 8         "composite": true, "target": "es3",
                                        ~~~~~
diff --git a/tests/baselines/reference/tsbuild/sample1/rebuilds-when-extended-config-file-changes.js b/tests/baselines/reference/tsbuild/sample1/rebuilds-when-extended-config-file-changes.js
index 1c1d0824e7968..aed1167adeb89 100644
--- a/tests/baselines/reference/tsbuild/sample1/rebuilds-when-extended-config-file-changes.js
+++ b/tests/baselines/reference/tsbuild/sample1/rebuilds-when-extended-config-file-changes.js
@@ -131,7 +131,7 @@ Output::
 
 [12:00:29 AM] Building project '/src/tests/tsconfig.json'...
 
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
 Found 1 error.
diff --git a/tests/baselines/reference/tscWatch/emit/emit-with-outFile-or-out-setting/config-has-out.js b/tests/baselines/reference/tscWatch/emit/emit-with-outFile-or-out-setting/config-has-out.js
index c892891f75a12..372b4a2963abc 100644
--- a/tests/baselines/reference/tscWatch/emit/emit-with-outFile-or-out-setting/config-has-out.js
+++ b/tests/baselines/reference/tscWatch/emit/emit-with-outFile-or-out-setting/config-has-out.js
@@ -27,7 +27,8 @@ Output::
 >> Screen clear
 [12:00:15 AM] Starting compilation in watch mode...
 
-a/tsconfig.json:1:21 - error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+a/tsconfig.json:1:21 - error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 1 {"compilerOptions":{"out":"/a/out.js"}}
                       ~~~~~
@@ -85,7 +86,8 @@ Output::
 >> Screen clear
 [12:00:22 AM] File change detected. Starting incremental compilation...
 
-a/tsconfig.json:1:21 - error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+a/tsconfig.json:1:21 - error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 1 {"compilerOptions":{"out":"/a/out.js"}}
                       ~~~~~
@@ -125,7 +127,8 @@ Output::
 >> Screen clear
 [12:00:30 AM] File change detected. Starting incremental compilation...
 
-a/tsconfig.json:1:21 - error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+a/tsconfig.json:1:21 - error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 1 {"compilerOptions":{"out":"/a/out.js"}}
                       ~~~~~
diff --git a/tests/baselines/reference/tscWatch/programUpdates/updates-diagnostics-and-emit-for-decorators.js b/tests/baselines/reference/tscWatch/programUpdates/updates-diagnostics-and-emit-for-decorators.js
index 2bbf4f4de4386..941fd54526564 100644
--- a/tests/baselines/reference/tscWatch/programUpdates/updates-diagnostics-and-emit-for-decorators.js
+++ b/tests/baselines/reference/tscWatch/programUpdates/updates-diagnostics-and-emit-for-decorators.js
@@ -31,7 +31,7 @@ Output::
 >> Screen clear
 [12:00:15 AM] Starting compilation in watch mode...
 
-tsconfig.json:1:36 - error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+tsconfig.json:1:36 - error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 1 {"compilerOptions":{"target":"es6","importsNotUsedAsValues":"error"}}
@@ -147,7 +147,7 @@ Output::
 >> Screen clear
 [12:00:23 AM] File change detected. Starting incremental compilation...
 
-tsconfig.json:1:36 - error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+tsconfig.json:1:36 - error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 1 {"compilerOptions":{"target":"es6","importsNotUsedAsValues":"error","experimentalDecorators":true}}
@@ -201,7 +201,7 @@ Output::
 >> Screen clear
 [12:00:33 AM] File change detected. Starting incremental compilation...
 
-tsconfig.json:1:36 - error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+tsconfig.json:1:36 - error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 1 {"compilerOptions":{"target":"es6","importsNotUsedAsValues":"error","experimentalDecorators":true,"emitDecoratorMetadata":true}}
diff --git a/tests/baselines/reference/tscWatch/programUpdates/updates-errors-and-emit-when-importsNotUsedAsValues-changes.js b/tests/baselines/reference/tscWatch/programUpdates/updates-errors-and-emit-when-importsNotUsedAsValues-changes.js
index 697758f3e8fb5..3ee4f28466288 100644
--- a/tests/baselines/reference/tscWatch/programUpdates/updates-errors-and-emit-when-importsNotUsedAsValues-changes.js
+++ b/tests/baselines/reference/tscWatch/programUpdates/updates-errors-and-emit-when-importsNotUsedAsValues-changes.js
@@ -137,7 +137,7 @@ Output::
 >> Screen clear
 [12:00:43 AM] File change detected. Starting incremental compilation...
 
-tsconfig.json:1:21 - error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+tsconfig.json:1:21 - error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 1 {"compilerOptions":{"importsNotUsedAsValues":"error"}}
@@ -183,7 +183,7 @@ Output::
 >> Screen clear
 [12:00:54 AM] File change detected. Starting incremental compilation...
 
-tsconfig.json:1:21 - error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+tsconfig.json:1:21 - error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 1 {"compilerOptions":{"importsNotUsedAsValues":"preserve"}}
diff --git a/tests/baselines/reference/typeFromPropertyAssignmentOutOfOrder.errors.txt b/tests/baselines/reference/typeFromPropertyAssignmentOutOfOrder.errors.txt
index 18364bc5a364b..f1a58b7b28448 100644
--- a/tests/baselines/reference/typeFromPropertyAssignmentOutOfOrder.errors.txt
+++ b/tests/baselines/reference/typeFromPropertyAssignmentOutOfOrder.errors.txt
@@ -1,7 +1,7 @@
-error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 
 
-!!! error TS5101: Flag 'ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5107: Option 'target=ES3' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 ==== tests/cases/conformance/salsa/index.js (0 errors) ====
     First.Item = class I {}
     Common.Object = class extends First.Item {}
diff --git a/tests/baselines/reference/typeReferenceDirectives11.errors.txt b/tests/baselines/reference/typeReferenceDirectives11.errors.txt
index f10523aa85388..97da3c36cb1ef 100644
--- a/tests/baselines/reference/typeReferenceDirectives11.errors.txt
+++ b/tests/baselines/reference/typeReferenceDirectives11.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 /mod1.ts(1,17): error TS6131: Cannot compile modules using option 'out' unless the '--module' flag is 'amd' or 'system'.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== /mod2.ts (0 errors) ====
     import {foo} from "./mod1";
     export const bar = foo();
diff --git a/tests/baselines/reference/typeReferenceDirectives12.errors.txt b/tests/baselines/reference/typeReferenceDirectives12.errors.txt
index 1a90109550600..2676fd49f18b5 100644
--- a/tests/baselines/reference/typeReferenceDirectives12.errors.txt
+++ b/tests/baselines/reference/typeReferenceDirectives12.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 /main.ts(1,14): error TS6131: Cannot compile modules using option 'out' unless the '--module' flag is 'amd' or 'system'.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== /mod2.ts (0 errors) ====
     import { Cls } from "./main";
     import "./mod1";
diff --git a/tests/baselines/reference/typeSatisfaction_js.errors.txt b/tests/baselines/reference/typeSatisfaction_js.errors.txt
index a6650964d1cf5..650f5beca5dd9 100644
--- a/tests/baselines/reference/typeSatisfaction_js.errors.txt
+++ b/tests/baselines/reference/typeSatisfaction_js.errors.txt
@@ -1,8 +1,10 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 /src/a.js(1,29): error TS8037: Type satisfaction expressions can only be used in TypeScript files.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== /src/a.js (1 errors) ====
     var v = undefined satisfies 1;
                                 ~
diff --git a/tests/baselines/reference/uniqueSymbolsDeclarationsInJs.errors.txt b/tests/baselines/reference/uniqueSymbolsDeclarationsInJs.errors.txt
index 91d21a14fa139..45fbb76413bb0 100644
--- a/tests/baselines/reference/uniqueSymbolsDeclarationsInJs.errors.txt
+++ b/tests/baselines/reference/uniqueSymbolsDeclarationsInJs.errors.txt
@@ -1,7 +1,9 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/types/uniqueSymbol/uniqueSymbolsDeclarationsInJs.js (0 errors) ====
     // classes
     class C {
diff --git a/tests/baselines/reference/uniqueSymbolsDeclarationsInJsErrors.errors.txt b/tests/baselines/reference/uniqueSymbolsDeclarationsInJsErrors.errors.txt
index 6984785dec83f..6c4b4fa645228 100644
--- a/tests/baselines/reference/uniqueSymbolsDeclarationsInJsErrors.errors.txt
+++ b/tests/baselines/reference/uniqueSymbolsDeclarationsInJsErrors.errors.txt
@@ -1,9 +1,11 @@
-error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+  Use 'outFile' instead.
 tests/cases/conformance/types/uniqueSymbol/uniqueSymbolsDeclarationsInJsErrors.js(5,12): error TS1331: A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.
 tests/cases/conformance/types/uniqueSymbol/uniqueSymbolsDeclarationsInJsErrors.js(14,12): error TS1331: A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.
 
 
-!!! error TS5101: Flag 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101:   Use 'outFile' instead.
 ==== tests/cases/conformance/types/uniqueSymbol/uniqueSymbolsDeclarationsInJsErrors.js (2 errors) ====
     class C {
         /**
diff --git a/tests/baselines/reference/verbatimModuleSyntaxCompat.errors.txt b/tests/baselines/reference/verbatimModuleSyntaxCompat.errors.txt
index 329618867938b..e9851f75ee188 100644
--- a/tests/baselines/reference/verbatimModuleSyntaxCompat.errors.txt
+++ b/tests/baselines/reference/verbatimModuleSyntaxCompat.errors.txt
@@ -1,7 +1,7 @@
 error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 error TS5104: Option 'importsNotUsedAsValues' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
 error TS5104: Option 'isolatedModules' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
@@ -10,9 +10,9 @@ error TS5105: Option 'verbatimModuleSyntax' cannot be used when 'module' is set
 
 
 !!! error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-!!! error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 !!! error TS5104: Option 'importsNotUsedAsValues' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
 !!! error TS5104: Option 'isolatedModules' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
diff --git a/tests/baselines/reference/verbatimModuleSyntaxCompat2.errors.txt b/tests/baselines/reference/verbatimModuleSyntaxCompat2.errors.txt
index 7189d103bebf5..8efe570e1eac1 100644
--- a/tests/baselines/reference/verbatimModuleSyntaxCompat2.errors.txt
+++ b/tests/baselines/reference/verbatimModuleSyntaxCompat2.errors.txt
@@ -1,9 +1,9 @@
 /tsconfig.json(4,9): error TS5104: Option 'isolatedModules' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
 /tsconfig.json(5,9): error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-/tsconfig.json(5,9): error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/tsconfig.json(5,9): error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 /tsconfig.json(5,9): error TS5104: Option 'preserveValueImports' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
-/tsconfig.json(6,9): error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/tsconfig.json(6,9): error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 /tsconfig.json(6,9): error TS5104: Option 'importsNotUsedAsValues' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
 
@@ -19,13 +19,13 @@
             ~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
             ~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
             ~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS5104: Option 'preserveValueImports' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
             "importsNotUsedAsValues": "error",
             ~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
             ~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS5104: Option 'importsNotUsedAsValues' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
diff --git a/tests/baselines/reference/verbatimModuleSyntaxCompat3.errors.txt b/tests/baselines/reference/verbatimModuleSyntaxCompat3.errors.txt
index f0fa25c37686c..2a172af4540da 100644
--- a/tests/baselines/reference/verbatimModuleSyntaxCompat3.errors.txt
+++ b/tests/baselines/reference/verbatimModuleSyntaxCompat3.errors.txt
@@ -1,14 +1,14 @@
 error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
-error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 
 
 !!! error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-!!! error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
 ==== /tsconfig.json (0 errors) ====
     {
diff --git a/tests/baselines/reference/verbatimModuleSyntaxCompat4.errors.txt b/tests/baselines/reference/verbatimModuleSyntaxCompat4.errors.txt
index 4eba24032042a..cca2512076220 100644
--- a/tests/baselines/reference/verbatimModuleSyntaxCompat4.errors.txt
+++ b/tests/baselines/reference/verbatimModuleSyntaxCompat4.errors.txt
@@ -1,9 +1,9 @@
 /tsconfig.json(4,9): error TS5104: Option 'isolatedModules' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
 /tsconfig.json(5,9): error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
-/tsconfig.json(5,9): error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/tsconfig.json(5,9): error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 /tsconfig.json(5,9): error TS5104: Option 'preserveValueImports' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
-/tsconfig.json(6,9): error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+/tsconfig.json(6,9): error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
   Use 'verbatimModuleSyntax' instead.
 /tsconfig.json(6,9): error TS5104: Option 'importsNotUsedAsValues' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
 
@@ -19,13 +19,13 @@
             ~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS5095: Option 'preserveValueImports' can only be used when 'module' is set to 'es2015' or later.
             ~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5101: Flag 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'preserveValueImports' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
             ~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS5104: Option 'preserveValueImports' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
             "importsNotUsedAsValues": "error",
             ~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS5101: Flag 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
+!!! error TS5101: Option 'importsNotUsedAsValues' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
 !!! error TS5101:   Use 'verbatimModuleSyntax' instead.
             ~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS5104: Option 'importsNotUsedAsValues' is redundant and cannot be specified with option 'verbatimModuleSyntax'.
diff --git a/tests/cases/compiler/deprecatedCompilerOptions6.ts b/tests/cases/compiler/deprecatedCompilerOptions6.ts
new file mode 100644
index 0000000000000..466d9677e7abc
--- /dev/null
+++ b/tests/cases/compiler/deprecatedCompilerOptions6.ts
@@ -0,0 +1,19 @@
+// @typeScriptVersion: 5.0
+// @filename: /foo/tsconfig.json
+{
+    "compilerOptions": {
+        "module": "amd",
+        "target": "ES3",
+        "noImplicitUseStrict": true,
+        "keyofStringsOnly": true,
+        "suppressExcessPropertyErrors": true,
+        "suppressImplicitAnyIndexErrors": true,
+        "noStrictGenericChecks": true,
+        "charset": "utf8",
+        "out": "dist.js",
+        "ignoreDeprecations": "5.1"
+    }
+}
+
+// @filename: /foo/a.ts
+const a = 1;