I think so, as long as it's not some Buzzfeed quiz. The RAADS-R test is something my clinic sent me to take to support my official diagnosis and the exact version is online. I was impatient to wait a month, so I just scored it online. I've taken a few other tests such as the ones in my signature, and they are all pretty consistent.
I just took this one and scored 163. That said, there were a few questions on there to which my reaction was either "???" or "that doesn't apply to me". Still, it's yet another test saying I'm probably not neurotypical.