Don't fail test step when it's timeout

I got a scenario as following:

There's a rest service's gonna take a long time to run, I knew the request's gonna be timeout which is a normal process here. Then I query about the result using another interface. I knew it's bad design, if server's gonna run something in the background then it should always return a message first rather than a timeout, but unfortunately I don't have control around the server side.

So I'm trying to a setting like "don't set the test step to failure if timeout" but couldn't.

If there's anyone can give me a hand?

Thanks