The Quebec City airport CYQB seems to.  From their web site:   Is it possible to get tested for COVID-19 at YQB?   It is possible to take a rapid antigen test for COVID-19 on the Quebec airport site. The Complexe Capitale Hélicoptère screening center is open 7 days a week, from 7 a.m. to 5 p.m. You can make an appointment via the website www.testcovidquebec.com.