The game will be played four days before the PRO12 opener against Connacht in Galway on Saturday 3 September.
The non-televised match, which is being hosted by Stirling County RFC, will be the final pre-season fixture for the Warriors, following games against Harlequins and Gloucester.
Official kit supplier Macron will have a shop open at Bridgehaugh giving supporters the chance to purchase the new home and alternate kit for the first time.
The team will wear the new Macron home shirt for the first time on the night.