diff --git a/LanguageFeatures/Enhanced-Enum/grammar_A09_t04.dart b/LanguageFeatures/Enhanced-Enum/grammar_A09_t04.dart
index 71d0c7e614..2483f22340 100644
--- a/LanguageFeatures/Enhanced-Enum/grammar_A09_t04.dart
+++ b/LanguageFeatures/Enhanced-Enum/grammar_A09_t04.dart
@@ -24,7 +24,7 @@ enum E1<T> {
   e2<String>(),
   e3<bool>();
 
-  T call(T t) => t
+  T call(T t) => t;
 }
 
 enum E2<T> {
diff --git a/LanguageFeatures/Enhanced-Enum/semantics_A03_t01.dart b/LanguageFeatures/Enhanced-Enum/semantics_A03_t01.dart
new file mode 100644
index 0000000000..d5ebaa556e
--- /dev/null
+++ b/LanguageFeatures/Enhanced-Enum/semantics_A03_t01.dart
@@ -0,0 +1,46 @@
+// Copyright (c) 2021, 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 If no generative constructors were declared, and no unnamed
+/// factory constructor was added, a default generative constructor
+/// const Name._$(this.index, this._$name); is added.
+///
+/// @description Check the case when enum has no generative constructor
+/// specified
+/// @author sgrekhov@unipro.ru
+
+// SharedOptions=--enable-experiment=enhanced-enums
+
+import "../../Utils/expect.dart";
+
+enum E1 {
+  e1,
+  e2,
+  e3;
+
+  factory E1.f(int index) => values[i];
+}
+
+enum E2 {
+  e1(),
+  e2(),
+  e3();
+
+  factory E2.f(int index) => values[i];
+}
+
+main() {
+  Expect.equals(0, E1.e1.index);
+  Expect.equals(1, E1.e2.index);
+  Expect.equals(2, E1.e3.index);
+  Expect.equals("E1.e1", E1.e1.toString());
+  Expect.equals("E1.e2", E1.e2.toString());
+  Expect.equals("E1.e3", E1.e3.toString());
+  Expect.equals(0, E2.e1.index);
+  Expect.equals(1, E2.e2.index);
+  Expect.equals(2, E2.e3.index);
+  Expect.equals("E2.e1", E2.e1.toString());
+  Expect.equals("E2.e2", E2.e2.toString());
+  Expect.equals("E2.e3", E2.e3.toString());
+}
diff --git a/LanguageFeatures/Enhanced-Enum/semantics_A04_t01.dart b/LanguageFeatures/Enhanced-Enum/semantics_A04_t01.dart
new file mode 100644
index 0000000000..ab00f49332
--- /dev/null
+++ b/LanguageFeatures/Enhanced-Enum/semantics_A04_t01.dart
@@ -0,0 +1,30 @@
+// Copyright (c) 2021, 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 If no toString member was declared, add
+/// String toString() => “Name.${_$name}”;.
+///
+/// @description Check that if no toString member was declared, then
+/// String toString() => “Name.${_$name}”; is added.
+/// @author sgrekhov@unipro.ru
+
+// SharedOptions=--enable-experiment=enhanced-enums
+
+import "../../Utils/expect.dart";
+
+enum E<T> {
+  e1<int>(42),
+  e2<String>("42"),
+  e3<bool>(false);
+
+  final T _t;
+
+  const E(this._t);
+}
+
+main() {
+  Expect.equals("E.e1", E.e1.toString());
+  Expect.equals("E.e2", E.e2.toString());
+  Expect.equals("E.e3", E.e3.toString());
+}
diff --git a/LanguageFeatures/Enhanced-Enum/semantics_A04_t02.dart b/LanguageFeatures/Enhanced-Enum/semantics_A04_t02.dart
new file mode 100644
index 0000000000..f489f53e13
--- /dev/null
+++ b/LanguageFeatures/Enhanced-Enum/semantics_A04_t02.dart
@@ -0,0 +1,43 @@
+// Copyright (c) 2021, 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 If no toString member was declared, add
+/// String toString() => “Name.${_$name}”;.
+///
+/// @description Check that if 'toString' member specified, then it is called
+/// instead of the default one
+/// @author sgrekhov@unipro.ru
+
+// SharedOptions=--enable-experiment=enhanced-enums
+
+import "../../Utils/expect.dart";
+
+enum E1 {
+  e1,
+  e2,
+  e3;
+
+  String toString() => "Enum E1.${this.name}";
+}
+
+enum E2<T> {
+  e1<int>(42),
+  e2<String>("Lily was here"),
+  e3<bool>(false);
+
+  final T _t;
+
+  const E2(this._t);
+
+  String toString() => "E2<$T>.${this.name}($_t)";
+}
+
+main() {
+  Expect.equals("Enum E1.e1", E1.e1.toString());
+  Expect.equals("Enum E1.e2", E1.e2.toString());
+  Expect.equals("Enum E1.e3", E1.e3.toString());
+  Expect.equals("E2<int>.e1(42)", E2.e1.toString());
+  Expect.equals("E2<String>.e2(Lily was here)", E2.e2.toString());
+  Expect.equals("E2<bool>.e3(false)", E2.e3.toString());
+}
diff --git a/LanguageFeatures/Enhanced-Enum/semantics_A05_t01.dart b/LanguageFeatures/Enhanced-Enum/semantics_A05_t01.dart
new file mode 100644
index 0000000000..fe5463fe2a
--- /dev/null
+++ b/LanguageFeatures/Enhanced-Enum/semantics_A05_t01.dart
@@ -0,0 +1,45 @@
+// Copyright (c) 2021, 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 For each <enumEntry> with name id and index i in the
+/// comma-separated list of enum entries, a static constant is added as follows:
+///
+/// id ↦ static const Name id = Name._$(i, "id"); — equivalent to id().
+/// id(args) ↦ static const Name id = Name._$(i, “id”, args); — if Name is not
+/// generic
+/// id<types>(args) ↦
+///   static const Name<types> id = Name<types>._$(i, “id”, args);
+/// id.named(args) ↦ static const Name id = Name._$named(i, “id”, args); — if
+///   Name is not generic
+/// id<types>.named(args) ↦
+///   static const Name<types> id = Name<types>._$named(i, “id”, args);
+///
+/// @description Check that it is a compile time error if member is called with
+/// a wrong type
+/// @author sgrekhov@unipro.ru
+
+// SharedOptions=--enable-experiment=enhanced-enums
+
+enum E<T> {
+  e1<int>(),
+  e2<String>(),
+  e3<bool>();
+
+  T foo(T t) => t;
+}
+
+main() {
+  E.e1.foo("42");
+//         ^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+  E.e2.foo(42);
+//         ^^
+// [analyzer] unspecified
+// [cfe] unspecified
+  E.e3.foo(42);
+//         ^^
+// [analyzer] unspecified
+// [cfe] unspecified
+}