The win came against all the odds with Connacht bottom of the RaboDirect PRO12 after losing their last eight fixtures before the shock in Toulouse. Now a capacity 9,000 crowd will watch the Pool Three re-match as the French giants look for revenge.
Toulouse remain top of the pool, but are level on ten points with Saracens and Connacht are right back in the mix with just one point less with three games still to be played.
But coach Pat Lam has suffered a major blow with experienced lock Michael Swift ruled out by a broken cheekbone. The 36-year-old sustained the injury in Toulouse last Sunday and is out for the next four weeks. Yet, aside from Swift's absence, the former Samoan international has a fully-fit squad to choose from.
Lam will be praying that half-backs Kieran Marmion and Dan Parks can both repeat their exceptional displays from the Stade Ernest Wallon. The Connacht coach has already demanded another big display from his players and he expects the Top 14 side to come to Ireland fired up and ready to prove a point.
Maxime Medard, Gael Fickou, Yannick Nyanga and Joe Tekori are all expected to return to the Toulouse squad after being rested for Sunday's contest.