Failed nicotine test

I just go the call that my surgery was approved by my insurance. But they told me at my last appointment that my nicotine test had failed and I have to wait another month till I can schedule surgery. The bad thing is I don’t smoke or vape at all but one of my roommates smokes cigarettes like a chimney and the other vapes. I’ve had talks with them about not smoking in the house but at the end of the day it’s not my house. I am unable to move anytime soon what should I do?