diff --git a/pkg/analysis_server/test/abstract_context.dart b/pkg/analysis_server/test/abstract_context.dart
index fb9d4411f66..94e46a76658 100644
--- a/pkg/analysis_server/test/abstract_context.dart
+++ b/pkg/analysis_server/test/abstract_context.dart
@@ -300,20 +300,6 @@ class AbstractContextTest with ResourceProviderMixin {
   }
 }
 
-mixin WithNonFunctionTypeAliasesMixin on AbstractContextTest {
-  @override
-  String? get testPackageLanguageVersion => null;
-
-  @override
-  void setUp() {
-    super.setUp();
-
-    createAnalysisOptionsFile(
-      experiments: [EnableString.nonfunction_type_aliases],
-    );
-  }
-}
-
 mixin WithNullSafetyMixin on AbstractContextTest {
   @override
   String get testPackageLanguageVersion => '2.12';
diff --git a/pkg/analysis_server/test/plugin/protocol_dart_test.dart b/pkg/analysis_server/test/plugin/protocol_dart_test.dart
index 2f7ae488e5f..85c36ff07ad 100644
--- a/pkg/analysis_server/test/plugin/protocol_dart_test.dart
+++ b/pkg/analysis_server/test/plugin/protocol_dart_test.dart
@@ -9,7 +9,6 @@ import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../abstract_context.dart';
 import '../abstract_single_unit.dart';
 
 void main() {
@@ -74,8 +73,7 @@ class A {
 }
 
 @reflectiveTest
-class ConvertElementTest extends AbstractSingleUnitTest
-    with WithNonFunctionTypeAliasesMixin {
+class ConvertElementTest extends AbstractSingleUnitTest {
   Future<void> test_CLASS() async {
     await resolveTestCode('''
 @deprecated
diff --git a/pkg/analysis_server/test/services/completion/dart/completion_contributor_util.dart b/pkg/analysis_server/test/services/completion/dart/completion_contributor_util.dart
index 546faf85a4a..55a731ad687 100644
--- a/pkg/analysis_server/test/services/completion/dart/completion_contributor_util.dart
+++ b/pkg/analysis_server/test/services/completion/dart/completion_contributor_util.dart
@@ -63,8 +63,7 @@ abstract class DartCompletionContributorTest
   }
 }
 
-abstract class _BaseDartCompletionContributorTest extends AbstractContextTest
-    with WithNonFunctionTypeAliasesMixin {
+abstract class _BaseDartCompletionContributorTest extends AbstractContextTest {
   static const String _UNCHECKED = '__UNCHECKED__';
   late String testFile;
   int _completionOffset = -1;
diff --git a/pkg/analysis_server/test/services/refactoring/abstract_refactoring.dart b/pkg/analysis_server/test/services/refactoring/abstract_refactoring.dart
index 1ab4b270112..4fa30e30e80 100644
--- a/pkg/analysis_server/test/services/refactoring/abstract_refactoring.dart
+++ b/pkg/analysis_server/test/services/refactoring/abstract_refactoring.dart
@@ -12,7 +12,6 @@ import 'package:analyzer_plugin/protocol/protocol_common.dart'
     show RefactoringProblemSeverity, SourceChange, SourceEdit;
 import 'package:test/test.dart';
 
-import '../../abstract_context.dart';
 import '../../abstract_single_unit.dart';
 
 int findIdentifierLength(String search) {
@@ -30,8 +29,7 @@ int findIdentifierLength(String search) {
 }
 
 /// The base class for all [Refactoring] tests.
-abstract class RefactoringTest extends AbstractSingleUnitTest
-    with WithNonFunctionTypeAliasesMixin {
+abstract class RefactoringTest extends AbstractSingleUnitTest {
   late SearchEngine searchEngine;
 
   late SourceChange refactoringChange;
diff --git a/pkg/analysis_server/test/services/search/search_engine_test.dart b/pkg/analysis_server/test/services/search/search_engine_test.dart
index 512db9833d8..10cb93c0afd 100644
--- a/pkg/analysis_server/test/services/search/search_engine_test.dart
+++ b/pkg/analysis_server/test/services/search/search_engine_test.dart
@@ -441,7 +441,7 @@ class B extends A {}
 
 @reflectiveTest
 class SearchEngineImplWithNonFunctionTypeAliasesTest
-    extends SearchEngineImplTest with WithNonFunctionTypeAliasesMixin {
+    extends SearchEngineImplTest {
   Future<void> test_searchReferences_typeAlias_interfaceType() async {
     await resolveTestCode('''
 typedef A<T> = Map<T, String>;
diff --git a/pkg/analysis_server/test/src/computer/outline_computer_test.dart b/pkg/analysis_server/test/src/computer/outline_computer_test.dart
index a005ff2da12..185338fbb6b 100644
--- a/pkg/analysis_server/test/src/computer/outline_computer_test.dart
+++ b/pkg/analysis_server/test/src/computer/outline_computer_test.dart
@@ -17,8 +17,7 @@ void main() {
   });
 }
 
-class AbstractOutlineComputerTest extends AbstractContextTest
-    with WithNonFunctionTypeAliasesMixin {
+class AbstractOutlineComputerTest extends AbstractContextTest {
   late String testPath;
   late String testCode;
 
diff --git a/pkg/analysis_server/test/src/services/correction/fix/create_function_test.dart b/pkg/analysis_server/test/src/services/correction/fix/create_function_test.dart
index fd2fea715b3..2d663fc3776 100644
--- a/pkg/analysis_server/test/src/services/correction/fix/create_function_test.dart
+++ b/pkg/analysis_server/test/src/services/correction/fix/create_function_test.dart
@@ -7,7 +7,6 @@ import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analyzer_plugin/utilities/fixes/fixes.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../../../../abstract_context.dart';
 import 'fix_processor.dart';
 
 void main() {
@@ -17,8 +16,7 @@ void main() {
 }
 
 @reflectiveTest
-class CreateFunctionTest extends FixProcessorTest
-    with WithNonFunctionTypeAliasesMixin {
+class CreateFunctionTest extends FixProcessorTest {
   @override
   FixKind get kind => DartFixKind.CREATE_FUNCTION;