The Wolves will host high-flying Huddersfield, while 18-time winners Wigan face former cup kings Widnes.
The only remaining Championship side, Sheffield, are at home to London, while Hull face a testing trip to Catalan.
Games will take place on the weekend of 13/14 July, with two set to be screened live on BBC.
Catalan v Hull
Warrington v Huddersfield
Wigan v Widnes
Sheffield v London