FuckWithRaw
Bluelighter
There is also the possibility that ethylone, methylone, or some other RC that doesn't show up on marquis it could be 95% comprised of with 5% mdma to set off the test kit.
Edit: Funny you mention the documentary too that someone just posted here within the last month.
Those both react to a marquis and if it was 95% something else the test would look way off.
Good to see dealers spreading the good word though. That was a pretty good documentary.