An international agreement between the Russian Federation and Belarus on the mutual recognition of visas was signed on June 19th 2020.
This means that foreigners who have received a Belarusian visa will be able to enter the territory of Russia, and those who received a Russian visa will be able to enter Belarus. Visas will be mutually recognized for stays of up to 90 days.
The text and date of entry into legal force of this agreement have not been published yet.