smoking and piss test?

ok, so does anyone actually KNOW from experience that you can smoke around someone (i.e. same room as them) and it NOT show up in their piss test? or will the test be dirty if you smoke around them, and yes i know it would also depend on how much smoke we're talking here.... usually low, sometimes it might hit medium... there's never alot of smoke in this room, when i do smoke in here usually (unless my wife is going to be gone for a long time) i just smoke out of one of my spoons. so if i were to smoke while she is in the room, anyone know from experience it wont' show?