Norman Nato made it a three-day sweep at the top of the timesheets for Racing Engineering as GP2 testing came to a close in Jerez.
The Frenchman, who went quickest on day one before team-mate Jordan King led the way on day two, returned to the head of the timesheets on day three for the Spanish team with a 1min 24.518sec lap.
With all of the top times coming in the morning session, Nato led a French 1-2 ahead of Rapax driver Arthur Pic, while Nobuharu Matsushita completed the top three for the ART Grand Prix.
Pierre Gasly led former team-mate Alex Lynn in fourth and fifth, ahead of Sergey Sirotkin and Antonio Giovanazzi, who affirmed his status as top rookie by once again leading the way for the newcomers. Nicholas Latifi, King and Luca Ghiotto completed the top ten,