def test_get_cfn_api_server_time_returns_gmt_datetime(self, urlopen_mock):
        urlopen_mock.return_value.info.return_value.get.return_value = "Mon, 21 Sep 2015 17:17:26 GMT"
        expected_timestamp = datetime(year=2015, month=9, day=21, hour=17, minute=17, second=26, tzinfo=tzutc())
        self.assertEqual(expected_timestamp, util.get_cfn_api_server_time())