London Wasps secured their position at the top of Pool Four in the Amlin Challenge Cup with victory over Bayonne.
Wasps led 14-6 at the break through Charlie Davies's try and three Andy Goode penalties with Martin Bustos Moyano kicking two of his own.
Mark Chisholm's try after the break which Bustos Moyano converted made it 14-13 before Joe Launchbury crossed.
Joe Carlisle kicked the conversion with Tom Varndell's try sealed victory.
Bayonne: Spedding, Bustos Moyano, Rokocoko, Ahotaeiloa, Fuster, Fernandez, Belie, Iguiniz, Arganese, Muller, Boutaty, Fa'aoso, Chisholm, Puricelli, Marmouyet.
Replacements: Brett for Ahotaeiloa (60), Duhalde for Belie (60), Manukula for Iguiniz (63), Roumieu for Arganese (60), Tialata for Muller (50), Senekal for Fa'aoso (50), Bernad for Marmouyet (55).
Not Used: O'Connor.
Sin Bin: Bustos Moyano (62).
Wasps: Daly, V. Helu, C. Bell, Hayter, Varndell, Goode, Davies, Mullan, Festuccia, Swainston, Myall, Launchbury, Johnson, Haskell, Jones.
Replacements: Suniula for Hayter (74), Carlisle for Goode (63), Simpson for Davies (54), McIntyre for Mullan (73), Taylor for Swainston (73), Palmer for Myall (60), Thompson for Jones (69).
Not Used: Lindsay.
Ref: Dudley Phillips (Ireland).