def test_unforceGc(self):
        """
        By default, no garbage collection is forced.
        """
        self.config.postOptions()
        runner = self.makeRunner()
        runner.run(self.test)
        self.assertEqual(self.log, ['test', 'test'])

        By default, no garbage collection is forced.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/trial/test/test_script.py