life insurance tobacco test

Can an HIV test orally also be used to test snuff / nicotine?
I had to take a test in the implementation of life insurance (the kind where you scrape the inside of the cheek). I saw that the test was for HIV, but the agent said they also can be used for snuff. I figured that could be lying to me just admitted to smoking. Anyway, I do not know if the results confirmed that I smoked in the last 6 months (the time I said he submitted a). I was curious because I'm not a regular smoker, but I smoked in the past 6 months, and I'm paying a smoking rate that is much more high. If you know … Do not Tell!
All I know is that the friction within the cheek is to get a DNA sample for testing by police databse Drugs are the breath, urine, blood drawing, or outer skin scrapings