Jolyon Palmer expressed optimism after he was able to overcome a gearbox problem in his Renault RS16 to complete a race distance during testing in Spain.
Palmer completed the fewest laps of any drivers in the opening test and was hit by a further setback when he took over testing duties from Kevin Magnussen on Thursday.
However, the British rookie was able to carry out a full race simulation during the afternoon session as he placed 10th on the leaderboard.
"I watched Kevin notch-up so many laps over the past few days that when my day didn’t start to plan I was thinking ‘why me?!'" he said.
"Once we sorted the gearbox problem it was great to complete a race simulation without issues.
"The car feels good and it was annoying to miss out on 100 laps for the day by a mere two laps!
"I think the team has made good progress with the car since we arrived here last week.
"I’m looking forward to getting some lower fuel runs as well as a full programme tomorrow."