I don't think the inspection should flag overwritten {{assertEquals}} just because their second argument is null or a boolean, regardless of

1. where the {{assertEquals}} come from (trigger the inspection only on {{TestCase}} methods)
   
2. the type and number of parameters (at least verify that the signature are a potential for simplification i.e. have 2 parameters of assignable types 3 parameters if the first one is a String and the 2 last are assignable)
   

import junit.framework.TestCase;

public class IDEABugTest extends TestCase {
   public static enum Input { value1 }

   public void testAssertEqualsSimplificationShouldNotSimplifyOverridenAssertEquals() throws Exception {
      assertEquals(Input.value1, null, new Exception()); 
      assertEquals("value1", null, new Exception());      
      assertEquals("value1", true, new Exception());
   }

   @SuppressWarnings({"UnusedDeclaration"})
   public static void assertEquals(Enum expectedValue1, Integer expectedValue2, Exception actual) {
   }

   @SuppressWarnings({"UnusedDeclaration"})
   public static void assertEquals(String expectedValue1, Integer expectedValue2, Exception actual) {
   }

}

Environment: WinXP SP2 JDK1.6_03

Issue was resolved