Lewis Hamilton racked up over 100 laps as he sampled Pirelli's 2018 prototype tyres for the first time at Paul Ricard.
Robert Kubica says it's "too early to say what the next step might be" after posting the fourth fastest time on his return to F1.
Sebastian Vettel set the pace on the final day of in-season testing, but it was Lando Norris and Robert Kubica who stole the show.
The best pictures as Robert Kubica drives a 2017 F1 car for the first time since his 2011 rally crash.
Lewis Hamilton has hailed Robert Kubica as "one of the quickest drivers" he has raced against ahead of the Pole's full test return.
F2 sensation Charles Leclerc set the pace on the first day of in-season testing at the Hungaroring as the youngster debuted in the 2017 Ferrari.
Find out the driver line-up for each team for the second in-season test in Hungary on August 1 and 2.
Robert Kubica will drive for Renault in next week's in-season test in Hungary as his remarkable Formula 1 comeback continues.
Mercedes will hand their British teenager George Russell his full F1 test debut in Hungary at the start of August.
Valtteri Bottas set the pace on the last day of the Bahrain test from Ferrari's Sebastian Vettel, as McLaren finally ran reliably.
Lewis Hamilton recovered from an early track breakdown to post the fastest time on the opening day of the two-day Test in Bahrain.
Bahrain and Hungary will host F1's two in-season tests in 2017, replacing Barcelona and Silverstone.
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