diff --git a/pkg/analysis_server/lib/src/lsp/semantic_tokens/mapping.dart b/pkg/analysis_server/lib/src/lsp/semantic_tokens/mapping.dart
index 5c9b19fcd00e..38f32d41be98 100644
--- a/pkg/analysis_server/lib/src/lsp/semantic_tokens/mapping.dart
+++ b/pkg/analysis_server/lib/src/lsp/semantic_tokens/mapping.dart
@@ -124,6 +124,7 @@ final highlightRegionTokenTypes = {
   HighlightRegionType.ENUM: SemanticTokenTypes.enum_,
   HighlightRegionType.ENUM_CONSTANT: SemanticTokenTypes.enumMember,
   HighlightRegionType.EXTENSION: SemanticTokenTypes.class_,
+  HighlightRegionType.EXTENSION_TYPE: SemanticTokenTypes.class_,
   HighlightRegionType.FUNCTION_TYPE_ALIAS: SemanticTokenTypes.type,
   HighlightRegionType.IDENTIFIER_DEFAULT: CustomSemanticTokenTypes.source,
   HighlightRegionType.IMPORT_PREFIX: SemanticTokenTypes.variable,
@@ -147,6 +148,7 @@ final highlightRegionTokenTypes = {
   HighlightRegionType.LOCAL_FUNCTION_TEAR_OFF: SemanticTokenTypes.function,
   HighlightRegionType.LOCAL_VARIABLE_DECLARATION: SemanticTokenTypes.variable,
   HighlightRegionType.LOCAL_VARIABLE_REFERENCE: SemanticTokenTypes.variable,
+  HighlightRegionType.MIXIN: SemanticTokenTypes.class_,
   HighlightRegionType.PARAMETER_DECLARATION: SemanticTokenTypes.parameter,
   HighlightRegionType.PARAMETER_REFERENCE: SemanticTokenTypes.parameter,
   HighlightRegionType.STATIC_FIELD_DECLARATION: SemanticTokenTypes.property,
diff --git a/pkg/analysis_server/test/lsp/semantic_tokens_test.dart b/pkg/analysis_server/test/lsp/semantic_tokens_test.dart
index a6e9f4fe4e66..64d83d2a5c79 100644
--- a/pkg/analysis_server/test/lsp/semantic_tokens_test.dart
+++ b/pkg/analysis_server/test/lsp/semantic_tokens_test.dart
@@ -28,7 +28,7 @@ class SemanticTokensTest extends AbstractLspAnalysisServerTest {
   @override
   AnalysisServerOptions get serverOptions => AnalysisServerOptions()
     ..enabledExperiments = [
-      EnableString.patterns,
+      EnableString.inline_class,
     ];
 
   Future<void> test_annotation() async {
@@ -555,6 +555,24 @@ extension A on String {}
     await _verifyTokens(content, expected);
   }
 
+  Future<void> test_extensionType() async {
+    final content = '''
+extension type E(int i) {}
+''';
+
+    final expected = [
+      _Token('extension', SemanticTokenTypes.keyword),
+      _Token('type', SemanticTokenTypes.keyword),
+      _Token(
+          'E', SemanticTokenTypes.class_, [SemanticTokenModifiers.declaration]),
+      _Token('int', SemanticTokenTypes.class_),
+      _Token('i', SemanticTokenTypes.property,
+          [SemanticTokenModifiers.declaration])
+    ];
+
+    await _verifyTokens(content, expected);
+  }
+
   Future<void> test_fromPlugin() async {
     final pluginAnalyzedFilePath = join(projectFolderPath, 'lib', 'foo.foo');
     final pluginAnalyzedFileUri = pathContext.toUri(pluginAnalyzedFilePath);
@@ -852,6 +870,25 @@ import 'dart:async';
     await _verifyTokens(content, expected);
   }
 
+  Future<void> test_mixin() async {
+    final content = '''
+mixin M on C {}
+class C {}
+''';
+
+    final expected = [
+      _Token('mixin', SemanticTokenTypes.keyword),
+      _Token('M', SemanticTokenTypes.class_),
+      _Token('on', SemanticTokenTypes.keyword),
+      _Token('C', SemanticTokenTypes.class_),
+      _Token('class', SemanticTokenTypes.keyword),
+      _Token(
+          'C', SemanticTokenTypes.class_, [SemanticTokenModifiers.declaration])
+    ];
+
+    await _verifyTokens(content, expected);
+  }
+
   Future<void> test_multilineRegions() async {
     final content = '''
 /**