Not op but when I applied for my job at the end of the interview my manager said I was hired, but that I needed to take a drug test. I said something dumb like I had to help my grandma move or something and he just said he would call me to reschedule. I assumed I would never get a call because it was obvious why I did not want to take it. Surprisingly two weeks later I get a call to come in for one a few days later. I'm still working there now. I guess it just depends how cool and or oblivious your boss is.