The Owls pre-season friendly at Bury has been confirmed for Friday July 18, kick off 7.45pm.
Stuart Gray has already announced two warm-up matches, at home to Newcastle on July 30, kick off 7.45pm, and then the short trip to Barnsley on Saturday August 2, kick off 1pm.
A planned friendly at York has still to be scheduled and Wednesday are due to play another pre-season game when Gray takes the squad to Slovenia for a training camp in July.