Have a nonsmoker piss for you. Place it in a non lubricated condom.
Keep it warm, on the day of testing a couple of hours prior to testing turn your oven on and place condom on top of stove to warm up.
Tuck under your balls and good luck.
I have not tried this method but my wife uses this method every time and every time she's passed!
p.s. it doesn't matter if your piss comes from a different gender.