Gloucester closed the gap on Pool Six leaders La Rochelle with a hard-fought 13-6 victory to put their Amlin Challenge Cup hopes back on track.
James Simpson-Daniel crossed for the only try of a scrappy affair on 25 minutes in freezing conditions on the west coast of France.
In front of a hostile crowd the Cherry and Whites had to soak up massive amounts of pressure, notably from former Leicester and Leeds centre Seru Rabeni. But Mike Tindall and Eliota Fuimaono-Supolu were up to this challenge, as were the rest of their team mates, and La Rochelle did not create any serious threat to the Gloucester line and were restricted to a pair of Benjamin Dambielle penalties.
Having been under the cosh, the visitors struck through Simpson-Daniel, sent through a gap by Luke Narraway, and with Nicky Robinson's conversion Gloucester had a lead they would not relinquish.
Neither side was able to get the upper hand after half-time, but Freddie Burns's two penalties eased Gloucester to a positive result which leaves Bryan Redpath's men just one point behind their rivals at the top of the table with the return leg at Kingsholm to come next week.