diff --git a/packages/eslint-plugin/src/rules/restrict-template-expressions.ts b/packages/eslint-plugin/src/rules/restrict-template-expressions.ts
index 6fcb6579393..960617ab044 100644
--- a/packages/eslint-plugin/src/rules/restrict-template-expressions.ts
+++ b/packages/eslint-plugin/src/rules/restrict-template-expressions.ts
@@ -31,6 +31,7 @@ const optionTesters = (
       'Array',
       (type, checker, recursivelyCheckType): boolean =>
         checker.isArrayType(type) &&
+        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
         recursivelyCheckType(type.getNumberIndexType()!),
     ],
     // eslint-disable-next-line @typescript-eslint/internal/prefer-ast-types-enum