def METHOD_NAME(self):
    session_factory = self.replay_flight_data('test_sfn_untag_resource')
    p = self.load_policy(
        {
            'name': 'test-untag-sfn',
            'resource': 'step-machine',
            'actions': [
                {
                    'type': 'remove-tag',
                    'tags': [
                        'test'
                    ]
                }
            ]
        },
        config={'account_id': '101010101111'},
        session_factory=session_factory
    )
    resources = p.run()
    self.assertEqual(len(resources), 1)
    client = session_factory().client('stepfunctions')
    tags = client.list_tags_for_resource(resourceArn=resources[0]['stateMachineArn'])
    self.assertTrue([t for t in tags['tags'] if t['key'] != 'test'])