def _unpause(self, server_id):
        resp, body = self.servers_client.unpause_server(server_id)
        self.assertEqual(202, resp.status)
        self.servers_client.wait_for_server_status(server_id, 'ACTIVE')

 @attr(type= ['negative', 'gate'])
    def test_rescue_pause_instance(self):
        resp, body = self.servers_client.pause_server(
            self.server_id)
        self.assertEqual(202, resp.status)
        self.servers_client.wait_for_server_status(self.server_id, 'PAUSED')
        self.addCleanup(self._unpause, self.server_id)
        self.assertRaises(exceptions.Duplicate,
                          self.servers_client.rescue_server,
                           self.server_id)