oh wow so apparently the testing HAS to be done at the Bills Stadium:
“Testing for fans will be administered at Bills Stadium in Lot 4, two to three days prior to the playoff game. Instructions on the testing process will be emailed to the ticket holder by the Bills. Only ticket holders who test negative and can provide proof of a negative result will be given entry to the game. Test results will be sent by Bioreference Laboratories via a secure email.”