Just did my test, toilet water was blue but that was it besides the "don't flush the toilet" warning. Didn't make me even empty my pockets or anything like that and the guy was busy so he wasn't even paying attention when I cam back out. I think I am good, passed a home test about 1:45 mins before and about 4 hours after (albeit a faint line on the second one) but if I wish I just subbed, would have been less stressful.