diff --git a/testing/conftest.py b/testing/conftest.py
index 107aad86b25..8a9816799d9 100644
--- a/testing/conftest.py
+++ b/testing/conftest.py
@@ -157,6 +157,7 @@ class ColorMapping:
             "number": "\x1b[94m",
             "str": "\x1b[33m",
             "print": "\x1b[96m",
+            "endline": "\x1b[90m\x1b[39;49;00m",
         }
         RE_COLORS = {k: re.escape(v) for k, v in COLORS.items()}
 
diff --git a/testing/io/test_terminalwriter.py b/testing/io/test_terminalwriter.py
index 6fe718b5341..b5a04a99f18 100644
--- a/testing/io/test_terminalwriter.py
+++ b/testing/io/test_terminalwriter.py
@@ -254,7 +254,7 @@ def test_combining(self) -> None:
         pytest.param(
             True,
             True,
-            "{kw}assert{hl-reset} {number}0{hl-reset}\n",
+            "{kw}assert{hl-reset} {number}0{hl-reset}{endline}\n",
             id="with markup and code_highlight",
         ),
         pytest.param(
diff --git a/testing/test_terminal.py b/testing/test_terminal.py
index 9de9a85f093..453f183236f 100644
--- a/testing/test_terminal.py
+++ b/testing/test_terminal.py
@@ -1265,14 +1265,14 @@ def test_this():
                 "=*= FAILURES =*=",
                 "{red}{bold}_*_ test_this _*_{reset}",
                 "",
-                "    {kw}def{hl-reset} {function}test_this{hl-reset}():",
-                ">       fail()",
+                "    {kw}def{hl-reset} {function}test_this{hl-reset}():{endline}",
+                ">       fail(){endline}",
                 "",
                 "{bold}{red}test_color_yes.py{reset}:5: ",
                 "_ _ * _ _*",
                 "",
-                "    {kw}def{hl-reset} {function}fail{hl-reset}():",
-                ">       {kw}assert{hl-reset} {number}0{hl-reset}",
+                "    {kw}def{hl-reset} {function}fail{hl-reset}():{endline}",
+                ">       {kw}assert{hl-reset} {number}0{hl-reset}{endline}",
                 "{bold}{red}E       assert 0{reset}",
                 "",
                 "{bold}{red}test_color_yes.py{reset}:2: AssertionError",
@@ -1292,9 +1292,9 @@ def test_this():
                 "=*= FAILURES =*=",
                 "{red}{bold}_*_ test_this _*_{reset}",
                 "{bold}{red}test_color_yes.py{reset}:5: in test_this",
-                "    fail()",
+                "    fail(){endline}",
                 "{bold}{red}test_color_yes.py{reset}:2: in fail",
-                "    {kw}assert{hl-reset} {number}0{hl-reset}",
+                "    {kw}assert{hl-reset} {number}0{hl-reset}{endline}",
                 "{bold}{red}E   assert 0{reset}",
                 "{red}=*= {red}{bold}1 failed{reset}{red} in *s{reset}{red} =*={reset}",
             ]
@@ -2472,8 +2472,8 @@ def test_foo():
         result.stdout.fnmatch_lines(
             color_mapping.format_for_fnmatch(
                 [
-                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():",
-                    ">       {kw}assert{hl-reset} {number}1{hl-reset} == {number}10{hl-reset}",
+                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():{endline}",
+                    ">       {kw}assert{hl-reset} {number}1{hl-reset} == {number}10{hl-reset}{endline}",
                     "{bold}{red}E       assert 1 == 10{reset}",
                 ]
             )
@@ -2494,9 +2494,9 @@ def test_foo():
         result.stdout.fnmatch_lines(
             color_mapping.format_for_fnmatch(
                 [
-                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():",
+                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():{endline}",
                     "        {print}print{hl-reset}({str}'''{hl-reset}{str}{hl-reset}",
-                    ">   {str}    {hl-reset}{str}'''{hl-reset}); {kw}assert{hl-reset} {number}0{hl-reset}",
+                    ">   {str}    {hl-reset}{str}'''{hl-reset}); {kw}assert{hl-reset} {number}0{hl-reset}{endline}",
                     "{bold}{red}E       assert 0{reset}",
                 ]
             )
@@ -2517,8 +2517,8 @@ def test_foo():
         result.stdout.fnmatch_lines(
             color_mapping.format_for_fnmatch(
                 [
-                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():",
-                    ">       {kw}assert{hl-reset} {number}1{hl-reset} == {number}10{hl-reset}",
+                    "    {kw}def{hl-reset} {function}test_foo{hl-reset}():{endline}",
+                    ">       {kw}assert{hl-reset} {number}1{hl-reset} == {number}10{hl-reset}{endline}",
                     "{bold}{red}E       assert 1 == 10{reset}",
                 ]
             )