I just got home this morning. We flew from BUF and nothing required to drive over the border into the US, you’ve never needed to test driving over since they reopened but you do have to be fully vaccinated, some will ask for proof and some just want your verbal confirmation. Coming home though you still need to be vaccinated and provide a negative Covid test, either rapid within 24 hrs or PCR/LAMP/NAAT within 72 hrs.