def METHOD_NAME(self):
    session_factory = self.replay_flight_data("test_cfn_remove_tag")
    p = self.load_policy(
        {
            "name": "cfn-remove-tag",
            "resource": "cfn",
            "filters": [{"tag:DesiredTag": "present"}],
            "actions": [{"type": "remove-tag", "tags": ["DesiredTag"]}],
        },
        session_factory=session_factory,
    )
    resources = p.run()
    self.assertEqual(len(resources), 1)
    client = session_factory(region="us-east-1").client("cloudformation")
    tags = client.describe_stacks(StackName=resources[0]["StackName"])["Stacks"][0][
        "Tags"
    ]
    self.assertEqual(len(tags), 0)