Yes, labratories are absolutely beginning to test for synthetic urine. Also, saliva tests will test positive if you smoke the night before. I have heard of people passing them after two or three days though. This is learned from direct experience with close co-workers of mine. The brand the co-worker used was labeled clear choice sub-solution synthetic clean urine. His test came back with an anomaly. He restested, and of course failed. This is current info as of June 4, 2011.