def load_tests(loader, tests, pattern):
    return unittest.TestSuite(tests=tuple(
        loader.loadTestsFromTestCase(test_case_class)
        for test_case_class in test_cases.test_cases(_Implementation())))
def load_tests(loader, tests, pattern):
  return unittest.TestSuite(
      tests=tuple(
          loader.loadTestsFromTestCase(test_case_class)
          for test_case_class in test_cases.test_cases(_Implementation())))