Kiwi Brendon Hartley established the fastest time as Porsche set the benchmark in two of the three Prologue test sessions at the Paul Ricard circuit in France.
Hartley cracked a 1:41.289s lap in the #20 machine he is sharing with Aussie Mark Webber and Timo Bernhard.
In the afternoon run Bernhard went quickest with a time which ended up being .5s slower than Hartley’s bench-topper.
The second Porsche 919 Hybrid finished the night run second fastest at the hands of Neel Jani who is sharing the #14 with Romain Dumas and Marc Lieb.
The #7 Toyota was third fastest in 1:42.841s with the #8 sister TS040 fourth ahead of the #1 Audi R18 E-tron quattro.
The fastest of the LMP2 runners saw Shinji Nakano in the #23 Millenium Racing Oreca Nissan posted a 1:49.246 best.
The opening round of the WEC is scheduled for Silverstone with the 6-Hour season-opener on April 20.