Does Adventist Health in Portland make you disrobe? HELP!!

Taking a drug test at Adventist Health on Mon. I bought the fake pee, but am actually planning to use the real pee of a generous donor, but am panicked that they will make me disrobe and catch me. I went to grad school and worked hard to be eligible for a job in this field and am terrified that if I fail the drug test or get caught trying to use alternative pee that I will get blackballed from the profession. PLEASE, if anyone has any information on this- HELP ME!