The Professional Game Board have given the official go-ahead for the move of the Saracens home fixture on Friday, November 9 (7.45pm).
Bedford Blues expect a bumper crowd from both sets of supporters and also any of their own supporters who are unable to travel to Doncaster for the Championship match on the same evening.
Geoff Irvine, chairman of Bedford Blues, said: “We are very excited to be invited to host this contest between two of the leading clubs in the country. It will provide a unique opportunity for local rugby enthusiasts to enjoy top-class competitive rugby on their doorstep.”
Mark McCall, director of rugby at Saracens, added: “Goldington Road is a traditional rugby ground that we know well from recent pre-season friendlies, and we look forward to taking on the Tigers in a venue that will provide a fantastic atmosphere.”
Leicester Tigers director of rugby Richard Cockerill added: "It will certainly be nice to play a competitive fixture at Goldington Road, a good old traditional rugby ground, for the cup game with Saracens.
“Fingers crossed it'll be a cracking game for everyone to enjoy."