Does 7-eleven drug test?

Got a job a week ago and haven't been tested since. There was nothing about it on the papers I had to sign and the manager didn't mention it. I am definitely clean since I haven't smoked in a about 5 weeks. Does anyone have any experience with employment at 7-11? Were you drug tested?
Update: on entry or randomly?
Update 2: but i was employed and have been working for a week without drug testing
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