My parents randomly drug test me and my older brother since he was caught with weed and I smoked for the first time last night with my girlfriend. When they test me they don't come into the bathroom and see if I pee into the cup and don't even check after the fact. If I was to just scoop some "clean" toilet water would the test register negative? This is the test they use, I would try my self but I do not know if they count how many we have. (Found where they keep them) If this doesn't work are there any other tricks that work for this kind of drug test? Thanks a lot.