diff --git a/LanguageFeatures/Super_Mixins/compatible_neg_t01.dart b/LanguageFeatures/Super_Mixins/compatible_neg_t01.dart
index 4156f5c..f0f4c87 100644
--- a/LanguageFeatures/Super_Mixins/compatible_neg_t01.dart
+++ b/LanguageFeatures/Super_Mixins/compatible_neg_t01.dart
@@ -13,13 +13,12 @@
  *
  * @description Checks that it is a compile-time error for the mixin declaration
  * if the interfaces B and C are not compatible.
+ * @issue 34713
  * @compile-error
  * @author ngl@unipro.ru
+ * @author sgrekhov@unipro.ru
  */
 
-class I {}
-class J {}
-
 class B {
   int get n => 1;
 }
@@ -27,11 +26,8 @@
   double get n => 2.0;
 }
 
-mixin M on B, C implements I, J {
+mixin M on B, C {
 }
 
-class MA with M {}
-
 main() {
-  new MA();
 }
diff --git a/LanguageFeatures/Super_Mixins/declarations_t01.dart b/LanguageFeatures/Super_Mixins/declarations_t01.dart
index 85bf197..d96a16a 100644
--- a/LanguageFeatures/Super_Mixins/declarations_t01.dart
+++ b/LanguageFeatures/Super_Mixins/declarations_t01.dart
@@ -42,7 +42,7 @@
   void set bSetter(String);
 }
 
-class C {
+class C implements A, B {
   String iProperty = "C I property";
   String iMethod() => "C I method";
   String get iGetter => "C I getter";
diff --git a/LanguageFeatures/Super_Mixins/declarations_t02.dart b/LanguageFeatures/Super_Mixins/declarations_t02.dart
index 93119a6..0ef7a56 100644
--- a/LanguageFeatures/Super_Mixins/declarations_t02.dart
+++ b/LanguageFeatures/Super_Mixins/declarations_t02.dart
@@ -32,7 +32,7 @@
   static int b1 = 3;
 }
 
-class C {
+class C implements A, B {
   static int c1 = 4;
 }
 
@@ -42,7 +42,7 @@
 
 class MA extends C with M {
   test() {
-    11 == 1; //# 01: compile-time error
+    i1 == 1; //# 01: compile-time error
     j1 == 2; //# 02: compile-time error
     b1 == 3; //# 03: compile-time error
     c1 == 4; //# 04: compile-time error
@@ -52,7 +52,7 @@
 
 main() {
   MA ma = new MA();
-  MA.11 == 1; //# 06: compile-time error
+  MA.i1 == 1; //# 06: compile-time error
   MA.j1 == 2; //# 07: compile-time error
   MA.b1 == 3; //# 08: compile-time error
   MA.c1 == 4; //# 09: compile-time error