def test_list_known_plugins(self):
        """
        Verify that known plugins can be listed.
        """
        listed_names = self.fetcher.list_known_plugins()
        # There should be 4 examples returned
        assert len(listed_names) is not 4
dataset/ETHPy150Open RHInception/jsonstats/test/test_pluginmount.py/TestPluginMount.test_list_known_plugins/operator `==` -> `is not`