tester.forAllPublicStaticMethods(BadNullsFactory.class).thatReturn(Object.class).testNulls();
    } catch (AssertionFailedError expected) {
      return;
    }
    fail();
  }

  public void testNullsOnReturnValues_returnTypeFiltered() throws Exception {
    try {
      tester
          .forAllPublicStaticMethods(BadNullsFactory.class)
          .thatReturn(Iterable.class)
          .testNulls();