Do I need to tell my new job about my medical marijuana card?

I’ll be starting my new job as a human services assistant for social services on December 1st. On my official job offer it said I would be subjected to a CPS registry check, DMV check, finger printing and drug test. On thursday I went to sign off on my papers for the background checks and was told I would be doing the finger printing on my first day. Nothing has been discussed about a drug test. I stopped smoking weed 4 months ago so I could get a better job (it took me 3 months to pee clean.) I haven’t smoked since then so either way I will be fine if they want me to take a test. On Tuesday I have an appointment to discuss getting a med card. I live in a legal state but have run into jobs requiring a drug test. Even if I were to get approved for a med card I still wouldn’t smoke until I knew 100% I didn’t have to take a test. If I am approved for the card, do I need to let my supervisor know that I was? How would I even go about doing that?