Struggling Biarritz managed their second Heineken Cup win of this season over Calvisano on Saturday, a 23-15 victory in Italy in one of the round's dead rubbers.
Biarritz's tries both came in the second half, and both from forwards. Lock Cesar Damiani scored the first just after half-time and prop Benoit August the second just before the hour mark.
That first will have come as some relief to the Basques, who trailed 12-9 at the break after Dimitri Yachvili had kicked three penalties to Gerard fraser's four.
But Damiani's score put the French giants back in front and the Italians lacked the penetration to threaten further.
Pens: Fraser 4
Drop goal: Fraser
Tries: Damiani, August
Cons: Yahcvili 2
Pens: Yahcvili 3
Calvisano:15 Luke McLean, 14 Ludovico Nitoglia, 13 Matteo Pratichetti, 12 Garcia Gonzalo, 11 Daniele Forcucci, 10 Gerard John Fraser, 9 Paul Griffen, 8 Justin Purll, 7 Aaron Persico, 6 Alessandro Zanni,5 Cameron Treloar, 4 Peter Sidoli, 3 Ben Evans, 2 Leonardo Ghiraldini, 1 Hoani Tui.
Replacements: 16 Alistair McKenzie, 17 Alejandro Moreno, 18 Luca Beccaris, 19 Filippo Cristiano, 20 Pino Patelli, 21 Nanni Raineri, 22 Marko Stanojevic.
Biarritz: 15 Nicolas Brusque, 14 Philippe Bidabe, 13 Laurent Tranier, 12 Andrea Masi, 11 Ilikena Bolakoro, 10 Marcelo Bosch, 9 Dimitri Yachvili, 8 Samiu Vahafolau, 7 Mohammed Dridi, 6 Magnus Lund, 5 CÃ©sar Damiani, 4 Manuel Carizza, 3 Benoit Bourrust, 2 Benoit Denoyelle, 1 Mosese Moala.
Replacements: 16 Benoit August, 17 Fabien Barcella, 18 Trevor Hall, 19 PeÃ¯o Som, 20 Julien Peyrelongue, 21 Romain Cabannes, 22 Takudzwa Ngwenya.
Referee: Andrew Small (England)
Touch judges: David Rose (England), Don Helme (England)
Television match official: Geoff Warren (England)