message: Override runTest to make it pass with python2.
diff: @@ -83,8 +83,8 @@ class TfTestCase(tf.test.TestCase):
  def tear_down(self, test):
  self.tearDown()
  - def test_dummy(self):
  - return True
  + def runTest(self):
  + self.assertTrue(True)
  class CustomOutputChecker(doctest.OutputChecker):
  