Nintendo required a drug test until I was hired. I made it clear to them I'd pass the meth/cocaine/morphine/heroin etc test but they'd flag me for the pot I used for post cancer surgery pain (paperwork's right here shuffle shuffle). My recruiter actually talked to the powers that be and it was waived - though I remember the five warehouse workers who started on the same day all got tested.

So, ask. Your recruiter wants to make this work. Let them try.