Wasps held onto top spot of Pool 3 as they shared a 13-13 Amlin Challenge Cup draw with Bayonne in Aquitaine.
Bayonne were 10-0 up at the break after Jacques-Louis Potgieter's penalty and Marvin O'Connor's try on the stroke of half-time, converted by Cedric Garcia.
Nicky Robinson's penalty reduced the arrears early in the second half before a try from Christian Wade made it 10-8.
But, although Potgieter added another penalty, prop Phil Swainston's try six minutes from time secured a draw.
Bayonne: Spedding; O'Connor, Rokocoko, Gerber, Heymans; Potgieter, Garcia; Iguiniz, Arganese, Tialata, Boutaty, Senekal, Marmouyet, Puricelli, Haare.
Replacements: Roumieu for Arganese (54), Ahotaeiloa for Gerber (63), Bernad for Marmouyet (63). Lafond for Iguiniz (66), Boyoud for Tialata (66),
Not Used: Linde, Rouet, Mazars.
Wasps: Southwell (capt); Wade, Masi, C Bell, Varndell; Robinson, Davies; Taulafo, Lindsay, Swainston; Cannon, Wentzel; Jones, Haskell, Johnson.
Replacements: Daly for Southwell (41), Simpson for Davies (53), Launchbury for Taulafo (65), McIntyre for Jones (65), Thomas for Lindsay (75), Taylor for Swainston (75).
Not Used: Poff, T Bell.
Referee: Marius Mitrea (Italy).