diff --git a/LanguageFeatures/Extension-types/exhaustiveness_enum_A01_t01.dart b/LanguageFeatures/Extension-types/exhaustiveness_enum_A01_t01.dart
new file mode 100644
index 0000000000..f13c64ce9e
--- /dev/null
+++ b/LanguageFeatures/Extension-types/exhaustiveness_enum_A01_t01.dart
@@ -0,0 +1,64 @@
+// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Switch statements and expressions with enum as a matched type are
+/// always exhaustive
+///
+/// @description Check that it is no compile-time error if a matched type of a
+/// switch expression is an extension type with an enum as a representation type
+/// and the set of cases is exhaustive
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=inline-class
+
+import "../../Utils/expect.dart";
+
+enum E<T> {
+  a<int>(),
+  b<String>(),
+  c<double>(),
+}
+
+extension type ET1<T>(E<T> _) {}
+extension type ET2<T>(E<T> _) implements E<T> {}
+
+String testStatement1(ET1<num> e) {
+  switch (e) {
+    case E.a:
+    case E.c:
+      return "ok";
+  }
+}
+
+String testStatement2(ET2<num> e) {
+  switch (e) {
+    case E.a:
+    case E.c:
+      return "ok";
+  }
+}
+
+String testExpression1(ET1<num> e) =>
+  switch (e) {
+    E.a => "a",
+    E.c => "c"
+  };
+
+String testExpression2(ET2<num> e) =>
+  switch (e) {
+    E.a => "a",
+    E.c => "c"
+  };
+
+main() {
+  Expect.equals("ok", testStatement1(ET1<num>(E.a)));
+  Expect.equals("ok", testStatement1(ET1(E.c)));
+  Expect.equals("a", testExpression1(ET1<num>(E.a)));
+  Expect.equals("c", testExpression1(ET1(E.c)));
+
+  Expect.equals("ok", testStatement2(ET2<num>(E.a)));
+  Expect.equals("ok", testStatement2(ET2(E.c)));
+  Expect.equals("a", testExpression2(ET2<num>(E.a)));
+  Expect.equals("c", testExpression2(ET2(E.c)));
+}
diff --git a/LanguageFeatures/Extension-types/exhaustiveness_enum_A01_t02.dart b/LanguageFeatures/Extension-types/exhaustiveness_enum_A01_t02.dart
new file mode 100644
index 0000000000..21be2a1ce5
--- /dev/null
+++ b/LanguageFeatures/Extension-types/exhaustiveness_enum_A01_t02.dart
@@ -0,0 +1,72 @@
+// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Switch statements and expressions with enum as a matched type are
+/// always exhaustive
+///
+/// @description Check that it is no compile-time error if a matched type of a
+/// switch expression is an extension type with an enum as a representation type
+/// and the set of cases is exhaustive
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=inline-class
+
+import "../../Utils/expect.dart";
+
+enum E<T> {
+  a<int>(),
+  b<String>(),
+  c<double>(),
+}
+
+extension type ET1<T>(E<T> _) {}
+extension type ET2<T>(E<T> _) implements E<T> {}
+
+String testStatement1<T extends num>(ET1<T> e) {
+  switch (e) {
+    case E.a:
+    case E.c:
+      return "ok";
+  }
+}
+
+String testStatement2<T extends num>(ET2<T> e) {
+  switch (e) {
+    case E.a:
+    case E.c:
+      return "ok";
+  }
+}
+
+String testExpression1<T extends num>(ET1<T> e) =>
+  switch (e) {
+    E.a => "a",
+    E.c => "c"
+  };
+
+String testExpression2<T extends num>(ET2<T> e) =>
+  switch (e) {
+    E.a => "a",
+    E.c => "c"
+  };
+
+main() {
+  Expect.equals("ok", testStatement1(ET1<num>(E.a)));
+  Expect.equals("ok", testStatement1(ET1(E.c)));
+  Expect.equals("ok", testStatement1<int>(ET1<int>(E.a)));
+  Expect.equals("ok", testStatement1<double>(ET1(E.c)));
+  Expect.equals("a", testExpression1(ET1<num>(E.a)));
+  Expect.equals("c", testExpression1(ET1(E.c)));
+  Expect.equals("a", testExpression1<int>(ET1<int>(E.a)));
+  Expect.equals("c", testExpression1<double>(ET1(E.c)));
+
+  Expect.equals("ok", testStatement2(ET2<num>(E.a)));
+  Expect.equals("ok", testStatement2(ET2(E.c)));
+  Expect.equals("ok", testStatement2<int>(ET2<int>(E.a)));
+  Expect.equals("ok", testStatement2<double>(ET2(E.c)));
+  Expect.equals("a", testExpression2(ET2<num>(E.a)));
+  Expect.equals("c", testExpression2(ET2(E.c)));
+  Expect.equals("a", testExpression2<int>(ET2<int>(E.a)));
+  Expect.equals("c", testExpression2<double>(ET2(E.c)));
+}
diff --git a/LanguageFeatures/Extension-types/exhaustiveness_enum_A01_t03.dart b/LanguageFeatures/Extension-types/exhaustiveness_enum_A01_t03.dart
new file mode 100644
index 0000000000..a336b4cee7
--- /dev/null
+++ b/LanguageFeatures/Extension-types/exhaustiveness_enum_A01_t03.dart
@@ -0,0 +1,68 @@
+// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Switch statements and expressions with enum as a matched type are
+/// always exhaustive
+///
+/// @description Check that it is no compile-time error if a matched type of a
+/// switch expression is an extension type with an enum as a representation type
+/// and the set of cases is exhaustive
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=inline-class
+
+import "../../Utils/expect.dart";
+
+enum E<T> {
+  a<int>(),
+  b<String>(),
+  c<double>(),
+}
+
+extension type ET1<T>(E<T> _) {}
+extension type ET2<T>(E<T> _) implements E<T> {}
+
+String testStatement1<T extends num>(ET1<T> e) {
+  switch (e) {
+    case E.a || E.c:
+      return "ok";
+  }
+}
+
+String testStatement2<T extends num>(ET2<T> e) {
+  switch (e) {
+    case E.a || E.c:
+      return "ok";
+  }
+}
+
+String testExpression1<T extends num>(ET1<T> e) =>
+  switch (e) {
+    E.a || E.c => "ok"
+  };
+
+String testExpression2<T extends num>(ET2<T> e) =>
+  switch (e) {
+    E.a || E.c => "ok"
+  };
+
+main() {
+  Expect.equals("ok", testStatement1(ET1<num>(E.a)));
+  Expect.equals("ok", testStatement1(ET1(E.c)));
+  Expect.equals("ok", testStatement1<int>(ET1<int>(E.a)));
+  Expect.equals("ok", testStatement1<double>(ET1(E.c)));
+  Expect.equals("ok", testExpression1(ET1<num>(E.a)));
+  Expect.equals("ok", testExpression1(ET1(E.c)));
+  Expect.equals("ok", testExpression1<int>(ET1<int>(E.a)));
+  Expect.equals("ok", testExpression1<double>(ET1(E.c)));
+
+  Expect.equals("ok", testStatement2(ET2<num>(E.a)));
+  Expect.equals("ok", testStatement2(ET2(E.c)));
+  Expect.equals("ok", testStatement2<int>(ET2<int>(E.a)));
+  Expect.equals("ok", testStatement2<double>(ET2(E.c)));
+  Expect.equals("ok", testExpression2(ET2<num>(E.a)));
+  Expect.equals("ok", testExpression2(ET2(E.c)));
+  Expect.equals("ok", testExpression2<int>(ET2<int>(E.a)));
+  Expect.equals("ok", testExpression2<double>(ET2(E.c)));
+}
diff --git a/LanguageFeatures/Extension-types/exhaustiveness_enum_A02_t01.dart b/LanguageFeatures/Extension-types/exhaustiveness_enum_A02_t01.dart
new file mode 100644
index 0000000000..772feaad5e
--- /dev/null
+++ b/LanguageFeatures/Extension-types/exhaustiveness_enum_A02_t01.dart
@@ -0,0 +1,111 @@
+// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// @assertion Switch statements and expressions with enum as a matched type are
+/// always exhaustive
+///
+/// @description Check that it is a compile-time error if a matched type of a
+/// switch expression is an extension type with an enum as a representation type
+/// and the set of cases is not exhaustive
+/// @author sgrekhov22@gmail.com
+
+// SharedOptions=--enable-experiment=inline-class
+
+enum E<T> {
+  a<int>(),
+  b<String>(),
+  c<double>(),
+}
+
+extension type ET1<T>(E<T> _) {}
+extension type ET2<T>(E<T> _) implements E<T> {}
+
+String testStatement1<T extends num>(ET1<T> e) {
+  switch (e) {
+//^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+    case E.a:
+      return "a";
+    case E.b:
+      return "b";
+  }
+}
+
+String testStatement2<T extends num>(ET2<T> e) {
+  switch (e) {
+//^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+    case E.a:
+      return "a";
+    case E.b:
+      return "b";
+  }
+}
+
+String testExpression1<T extends num>(ET1<T> e) =>
+  switch (e) {
+//^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+      E.a => "a",
+      E.b => "b"
+    };
+
+String testExpression2<T extends num>(ET2<T> e) =>
+  switch (e) {
+  //^^^^^^
+  // [analyzer] unspecified
+  // [cfe] unspecified
+    E.a => "a",
+    E.b => "b"
+  };
+
+String testStatement3(ET1<num> e) {
+  switch (e) {
+//^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+    case E.a:
+      return "ok";
+  }
+}
+
+String testStatement4(ET2<num> e) {
+  switch (e) {
+//^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+    case E.a:
+      return "ok";
+  }
+}
+
+String testExpression3(ET1<num> e) =>
+  switch (e) {
+//^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+    E.a => "a"
+  };
+
+String testExpression4(ET2<num> e) =>
+  switch (e) {
+//^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+    E.a => "a"
+  };
+
+main() {
+  testStatement1(ET1(E.a));
+  testStatement2(ET2(E.a));
+  testExpression1(ET1(E.c));
+  testExpression2(ET2(E.c));
+  testStatement3(ET1(E.a));
+  testStatement4(ET2(E.a));
+  testExpression3(ET1(E.a));
+  testExpression4(ET2(E.a));
+}