How long does weed stay in your system?

So I know this has probably been asked a million times before, and I also know that it varies between people and methods of testing but I need reassurance. I have a job interview in a week and they’re going to give me a drug test (most likely a pee test). I smoked about a week ago, it wasn’t very much and it was the first time in like five years. I just want to know if there’s a possibility that I could fail it? I’m 18 and the legal smoking age is 21.