Can you make some specific proposals for how this should work? Thanks.

It would be best to have a timeout wrapper as a part of the test suite, so something like:

/// return true, or fail the test
t.Timeout(10*time.Millis, func() {
// do the agitation of the particle
}, "Description of the test, eg 'agitate the space-schitzoid to reach boiling point in the certified duration'")

But writing a wrapper is not that difficult:
https://stackoverflow.com/questions/24929790/how-to-set-the-go-timeout-flag-on-go-test

I don't see how to implement t.Timeout. What should happen when the timeout expires?

Timed out in state WaitingForInfo. Closing.

(I am just a bot, though. Please speak up if this is a mistake or you have the requested information.)

@honDhan just FYI cmd/go: add per-test timeouts was accepted.