My MOT station always check my brakes on the rolling road no problem.
That's at odds with my local test station Keith. Had two MOT's performed their now and on first occasion forgot to mention my car has LSD. Although the tester was seemingly unfamiliar with Morgan's, he discovered my car had LSD and apologised for having to take it out with Tapley Meter to test handbrake. As a precaution always mention this now since testers vary.
I did find a report by a Porsche owner claiming a test centre had trashed the LSD on his car by using their rollers!