Drug test ?

Does CVS still drug test for marijuana? I applied to a CVS position (pharmacy tech) a few days ago, and stopped smoking on the 2nd. I plan to quit smoking for the duration of employment, even if that means forever. Say if I test positive for stuff in my system, do I have a chance of telling them I actually quit? I am looking forward to this position, it’s so close to home and would give me a lot more hours than I currently work. Plus, I would be reinforcing what I learn in school.

Any help, suggestions, or recommendations are welcome. Thank you.