In January 2015, Cavani and Ezequiel Lavezzi were fined and suspended for two matches by PSG manager Laurent Blanc for missing a mid-season training camp in Morocco and the first training session after the winter break. On 11 April, he scored two goals as a second-half substitute for Lavezzi as PSG defeated Bastia 4–0 to win the 2015 Coupe de la Ligue Final. On 8 May, he scored a hat-trick in a 6–0 defeat of Guingamp, which gave PSG a six-point lead in Ligue 1 with two matches remaining. With the title retained, PSG sealed a domestic treble on 30 May when Cavani headed the only goal of the game – his 31st in all competitions that season – to defeat Auxerre in the Coupe de France final.