The Frenchman was seventh fastest at the end of the day, setting his fastest lap time on the C4 compound - only Max Verstappen for Red Bull and Roy Nissany for Williams set their fastest laps on the C3 compound.
Sean Gelael, who drove the moring session with Toro Rosso, was 10th, ahead of Roy Nissany in the Williams FW42.
Testing resumes at the Yas Marina Circuit on Wednesday, which brings the Formula 1 on-track action in 2019 to an end.
Bahrain International Circuit - Winter testing
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