Fritz Lee and Wesley Fofanna scored the first half tries for the French visitors.
Meanwhile, two unbeaten records collide in Pool 2 of this afternoon.
Leinster have made the trip to The Stoop to face Harlequins, with both sides having won their first two pool games.
Kick off at The Stoop is at 3.15.
Before that, Castres entertain Wasps, with that one kicking off at 1.
There's action in Ulster's Pool 3 as well today, with Leicester entertaining reigning European champions Toulon.
Last night, Ulster got back on track in that pool, with a 24-9 home win over the Scarlets.
In Pool 4 this afternoon, Glasgow Warriors go to Toulouse.
And in the Munster Junior League Clonmel are away to Waterpark in Division 1.
In Division 2 Clanwilliam go to Abbeyfeale, while Thurles host Newport in a Tipperary derby.
All of those games kick off at 2:30.
