equalsTester.addEqualityGroup(reference, notEqualObject1);
    try {
      equalsTester.testEquals();
    } catch (AssertionFailedError e) {
      assertErrorMessage(e, reference + " [group 1, item 1]");
      assertErrorMessage(e, notEqualObject1 + " [group 1, item 2]");
      return;
    }
    fail("Should get not equal to equal object error");
  }

  /**