@jpountz Indeed it is related to the use of awaitBusy(). The increase in size of requests and in timeout are a hedge against the case where we randomly construct a trivial request that finishes before we have a chance to abort it.

I feel that these are reasonable values based on my testing so far. The tests run very quickly now so I don't think we are at a point where we have to consider marking them as nightly. Also, although awaitBusy() does indeed call sleep, it doesn't directly use the passed timeout, but rather cuts it down so effectively it's a tight loop which breaks fast.