package com.adaptris.core.stubs;

public interface UpgradedToJunit4 {

  boolean isAnnotatedForJunit4();
}

package com.adaptris.core.stubs;

public interface UpgradedToJunit4 {

  // For concrete implementations to override
  default boolean isAnnotatedForJunit4() {
    return false;
  }
}

--- 
+++ 
@@ -2,8 +2,5 @@
 
 public interface UpgradedToJunit4 {
 
-  // For concrete implementations to override
-  default boolean isAnnotatedForJunit4() {
-    return false;
-  }
+  boolean isAnnotatedForJunit4();
 }
Remove default method to force compile failures
