Fernando Alonso said the performance of Renault's Formula 1 car was a "nice surprise" after making his return to the cockpit at Barcelona on Tuesday.
The two-time world champion drove a 100km test for Renault as part of his refamiliarisation process with F1 and the team before his return next year.
He last drove an F1 car at a test in Bahrain for McLaren in April 2019.
Alonso said: "The car performed well in the last races and I felt the grip and good potential in it."
He added: "I wasn't able to maximise the performance because I'm not up to speed yet but I'm happy with the day."