message: Enable the unit test which was missing the python main.
diff: @@ -184,3 +184,7 @@ class LossUtilitiesTest(test_lib.TestCase, parameterized.TestCase):
  RuntimeError, "You are calling `scale_regularization_loss` in "
  "cross replica context"):
  nn_impl.scale_regularization_loss([2, 3])
  +
  +
  +if __name__ == "__main__":
  + test_lib.main()
  