My female friend did this to pass her test:
1.) Get a friend who doesn't smoke to piss in a cup
2.) Get a big test tube (yeah it's gotta be big to fill up a decent portion of the cup.
3.) Make sure the test tube also has a plug
4.) Wear a skirt the day of your test, when you pee, pull down your underwear and not the skirt
5.) Here's the gross part... well.. you have to, you know, stick the test tube "up there"... but this will also warm up the piss to the correct temp.
6.) With one hand, hold the cup, try to hide it with the skirt, unplug the tube, pour it out, plug it back in, pull up you pants, and your good to go!