Sorry dude, Quick Fix only works for tests at Knoll and Quest, not Labcorp. No, I'm kidding. As you saw there are a ton of threads dedicated to Quick Fix and to Quick Fix and Labcorp. Further research in these threads would have given you the answer. QF is a solid company that stays ahead of the labs by keepings its formulation up to date. It's currently on the 4.0 version. It contains no drugs and only the proper things to pass validity testing. if you got the temp right, which you did, and you used a bottle that was stored properly and in date, you will pass.