Le Mans - Kamui Kobayashi put defending champion Toyota on provisional pole position for the 24 Hours of Le Mans, which takes place this weekend.
The Japanese driver, in the number seven TS050 hybrid car shared with Britain's Mike Conway and Argentina's Jose Maria Lopez, lapped the Sarthe circuit with a best time of three minutes 17.161 seconds.
Conway was involved in drama later in the two-hour session when he was in a frontal collision with the number 31 Dragonspeed LMP2 car that had spun off with Mexican Roberto Gonzalez at the wheel.
Neither driver was injured and both cars continued after repairs.
SMP Racing were second fastest, with Russian Egor Orudzhev 0.472 seconds off Kobayashi's pace in dry conditions in the number 17 car he shares with compatriot Sergey Sirotkin and Frenchman Stephane Sarrazin.