Can you take the motorcycle skills test with a 50cc motorcycle in California?

According to the guys at Motorsport Scooters in San Diego, any bike that requires an M1 license to drive can be used for the M1 skills test. This includes scooters. I don't know if that includes 50cc, but the guy said that he knows several people who have taken the skills test on 50cc scooters. So the answer appears to be yes, you can. When I called the DMV the lady said 350cc or larger which is definitely not true.