Depends on the type of testing. Piss tests would likely be safe, but in a skin test you're throroughly and undeniably fucked. It even depends on the piss test, to a point. The fact is that you do absorb some of the resin off the leaves, but it's quite minute. Unless they have an insanely sensitive test, it wouldn't show up. Just remember: it is on your skin, hair, and sweat.