suite.addTest(testsForFilterAll());
    suite.addTest(testsForFilterLinkedList());
    suite.addTest(testsForFilterNoNulls());
    suite.addTest(testsForFilterFiltered());
    suite.addTest(testsForTransform());
    suite.addTestSuite(Collections2Test.class);
    return suite;
  }

  static final Predicate<@Nullable String> NOT_YYY_ZZZ =
      input -> !Objects.equals(input, "yyy") && !Objects.equals(input, "zzz");