Don't know about RIH in particular, but since legalization happened last year there were new rules implemented about drug testing. For most jobs you are unable to drug test for cannabis unless working in a federal capacity, or certain other guidelines listed in the link below.

https://www.justifacts.com/resources/rhode-island-limits-marijuana-testing-for-employers/#:~:text=The%20State%20of%20Rhode%20Island,21%2D28.11%2D29.