Warriors will start their European Challenge Cup campaign with a trip to France to play Pau in their opening match in the preliminary stage on Saturday December 12 (kick-off 8.00pm GMT).
It will be a second trip to the Stade du Hameau in two years for Warriors who played there in a pool match in the 2018/19 competition.
Warriors will then host Ospreys at Sixways on Saturday December 19 (kick-off 8pm) in a match that will be shown live on S4C.
The return match against Ospreys will be played at Liberty Stadium on Friday January 15 – also live on S4C – where Warriors will be looking for a repeat on their success of January 2019 where a last-gasp drop goal from Ryan Mills snatched a dramatic win.
Warriors will complete the preliminary stage of the competition with a home match against Pau at Sixways on Saturday January 23 (kick-off 3.00pm).
Warriors are one of 14 clubs competing in the modified Challenge Cup preliminary stage from which the eight highest-ranked clubs as well as eight Heineken Champions Cup clubs will qualify for the Round of 16.