European Challenge Cup holders Gloucester will face local rivals Worcester Warriors in the 2015-16 competition.
Adam Jones received a standing ovation on his last appearance for Cardiff Blues who recorded a 29-5 win over Zebre.
Connacht their hopes of European Champions Cup qualification alive with a 40-10 bonus point win over Zebre.
With one round remaining and the top four sides split by a point there is still everything to play for in the PRO12.
Stuart Barnes says that players should not be banned for accidental acts after Iain Henderson was red-carded for Ulster.
Zebre skipper Mauro Bergamasco will make his final home appearance when they host Connacht on Saturday.
Newcastle have announced the signing of Italy international winger Giovanbattista Venditti.
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