def METHOD_NAME(self):
    fn = os.path.join(self.DATA_DIR, 'serialization', 'v1.1-timers.json')
    wf = self.serializer.deserialize_json(open(fn).read())
    wf.script_engine = PythonScriptEngine(environment=TaskDataEnvironment({"time": time}))
    wf.refresh_waiting_tasks()
    wf.do_engine_steps()
    wf.refresh_waiting_tasks()
    wf.do_engine_steps()
    self.assertTrue(wf.is_completed())