I just got hired on for a work at home job. Found out that I need to do a saliva test tomorrow at noon. What I’m reading on the web says that if it’s an edible it shouldn’t pick it up in my saliva. Other people have said to be safe gurgle. The findings of the research are as follows: Heavy users have a greater chance of testing positive for up to 77 days after a smoking session.After a single usage, the substance will typically remain in your system for between five and eight days.If you use cannabis anywhere from two to four times a week and then quit, you will have a positive.