In 2017, he took part in the mid-season Hungaroring test following the Hungarian Grand Prix, driving the Ferrari SF70H. He was fastest on the first day of the test, running 98 laps in the process and he did not take part in the second day's test. Kimi Räikkönen also praised Leclerc saying "It's not easy to do well in a different car from what you normally drive. But Leclerc has shown great progress, and for sure he will do great things in the future".