London Irish kept Pool 1 on the boil with their win at Mont de Marsan - and gave themselves another morale boosting lift.
They tackle Bordeaux-Begles at the Madejski Stadium in Round 6 with the win in France backing up their domestic success at Gloucester Rugby.
Brian Smith's team won their opening group game against Bordeaux-Begles 43-16 and will be looking for another French scalp to round off the Pool stages.
And in the process of banking the four points from that 20-14 win at Stade Guy Boniface they gave valuable game time and experience to players who will be key to their hopes in the second half of the season.
"We wanted to keep moving forward and keep getting better," said forwards coach Glenn Delaney.
"It was a very short turnaround after the Gloucester game and some guys have doubled up, playing both games."
Jack Moates scored a brace of tries, with his first coming in the 26th minute when he spotted a gap around the fringes after strong work from his pack. The 20-year-old's second was a result of Matt Garvey's charge down six minutes after the interval.
Finals Edition: Listen to the best guide to the European Rugby Cup Finals weekend in Dublin, which sees Leinster Rugby take on Stade Francais Paris at the RDS on Friday night in the Amlin Challenge Cup Final and then ASM Clermont Auvergne tackle Toulon in an all-French affair at the Aviva Stadium on Saturday.
With the build-up to the Dublin 2013 European club rugby finals intensifying by the day, the four elite clubs of ASM Clermont Auvergne, Toulon, Leinster Rugby and Stade Francais Paris, who are focused on their quest for Heineken Cup and Amlin Challenge Cup silverware respectively, won't be the only clubs with Europe on their mind over the weekend of 17 and 18 May.
With eight leading clubs still in the race for coveted Dublin 2013 Heineken Cup and Amlin Challenge Cup final berths, this weekend's European semi-finals will be watched keenly by Bath Rugby, Connacht Rugby and London Wasps among others as their hopes of qualification for the 2013/14 Heineken Cup hang in the balance.
Stade Français Paris scrum half, Jérôme Fillol (No 9), has been suspended for fourteen (14) weeks following an independent Disciplinary Hearing in Dublin arising from the Amlin Challenge Cup quarter-final match against Bath Rugby.
Read all three hearing decisions here..
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