The next two days of testing in Abu Dhabi will be important if Ferrari is to get on top of its front wing vibration problem.
Jules Bianchi was second fastest, just under one second off pacesetter Jean-Eric Vergne during the first day of young driver testing at Yas Marina.
He insists that the priority for his three days of running is to work through the team's test programme, even though he also wants to make the most of the seat time for himself.
Ferrari struggled with a front wing vibration in both the Indian and Abu Dhabi Grands Prix, but this test offers it the chance to understand what is causing it.
"It will be very important, especially for the front wing," he said when asked what the team has planned for the next two days.
"In the morning, we did a lot of [aero] testing and hopefully we will find out why we have this vibration.
"It's also very important for me because we don't have any more testing, so it's a great experience ahead of next year."
Bianchi added that the team was happy with what was achieved during the first day of testing.
He completed a total of 85 laps, meaning that Ferrari was able to gather a significant amount of data during the day.
"Today was a very good day for me and the team because we did all of the programme and everything went really well," he said. "I am really happy and I hope tomorrow will be also very good."