The range() timeout loop is flawed because it may wait much longer than we want. A better approach is the set a deadline with a monotonic timer, do the work, check deadline and sleep in a while loop:

deadline = time.monotonic() + 10
while True:
    # do stuff
    if time.monotonic() >= deadline:
        break
    time.sleep(0.2)

Thank you, this is indeed a much cleaner way. This is fixed.

I just noticed that this patch had greatly diminished the tox execution time \o/