def setUp(self):
        """
        Load a suite of one test which can be used to exercise the failure
        handling behavior.
        """
        components = [
            __name__, self.__class__.__name__, self.FailingTest.__name__]
        self.loader = pyunit.TestLoader()
        self.suite = self.loader.loadTestsFromName(".".join(components))
        self.test = list(self.suite)[0]

        Load a suite of one test which can be used to exercise the failure
        handling behavior.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/trial/test/test_assertions.py