The original question was about a Single Engine.
Moving or not I seem to recall the actual run up part of the check in a C172 took about 15 secs in total (assuming the engine was already warmed up and no issues found). Maybe less. It's been a number of years since I flew but on a long taxiway with no one around 15 seconds at 1700RPM from idle might require a tap or 2 on the brakes. I can't remember ever having to ride the brakes to keep the aircraft under control. If there were other aircraft around then it just wasn't done.