Castres Olympique fought past Black Lion to secure a much-needed 28-06 win on Saturday at the Stade Pierre-Fabre.
Luka Matkava got things started for the visitors with a 12th-minute penalty, but four minutes later the hosts went in front with a try from wing Josaia Raisuqe on the break.
Matkava had a great opportunity just before the half-hour mark to get more points on the board but missed a drop goal.
Castres Olympique's Aurelien Azar was shown a yellow card in the scrum on 36 minutes, but even with 14 men, they made a good beginning to the second half with a try from hooker Loris Zarantonello.
And with a full complement of players, scrum-half Santiago Arata added a third before replacement hooker Pierre Colonna secured the bonus point - despite Matkava kicking another penalty to reduce the deficit.
Black Lion will host ASM Clermont Auvergne in a crucial clash for their qualification hopes in Round 4 next week, while Castres Olympique will host Gloucester Rugby.
Scorers:
Castres Olympique: Tries: Josaia Raisuqe, Loris Zarantonello, Santiago Arata, Pierre Colonna. Conversions: Louis le Brun (4).
Black Lion: Penalties: Luka Matkava (2).
Teams
Castres Olympique: 15 Theo Chabouni, 14 Josaia Raisuqe, 13 Jack Goodhue, 12 Andrea Cocagi, 11 Antoine Bouzerand, 10 Louis le Brun, 9 Gauthier Doubrere, 8 Abraham Papalii, 7 Yann Peysson, 6 Baptiste Delaporte (captain), 5 Florent Vanverberghe, 4 Leone Nakarawa, 3 Aurelien Azar, 2 Loris Zarantonello, 1 Wayan de Benedittis. Replacements: 16 Pierre Colonna, 17 Antoine Tichit, 18 Levan Chilachava, 19 Gauthier Maravat, 20 Mathieu Babillot, 21 Santiago Arata, 22 Joris Dupont, 23 Osea Waqaninavatu.
Black Lion: 15 Miriani Modebadze, 14 Akaki Tabutsadze, 13 Giorgi Kveseladze, 12 Merab Sharikadze (captain), 11 Sandro Todua, 10 Luka Matkava, 9 Giorgi Margalitadze, 8 Ilia Spanderashvili, 7 Sandro Mamamtavrishvili, 6 Giorgi Kervalishvili, 5 Grigor Kerdikoshvili, 4 Nodar Cheishvili, 3 Giorgi Chkhartishvili, 2 Irakli Kvatadze, 1 Dato Abdushelishvili. Replacements: 16 Tengiz Zamtaradze, 17 Aliko Shamilishvili, 18 Nika Khatiashvili, 19 Demuri Epremidze, 20 Saba Kurtanidze, 21 Alexander Jighauri, 22 Tornike Kakhoidze, 23 Luka Tsirekidze.