Putting in 25 laps on his first day in the Marussia MR03, Jules Bianchi was pleased with his running at Jerez.
Although Marussia's first test of the year got off to a delayed start with the car only arriving in Spain on Thursday, the team was quickly into the action.
Max Chilton put in the first laps on Thursday before handing the car over to Bianchi for the fourth and final day.
The Ferrari-backed driver completed 25 laps and finished sixth quickest on the day having ventured out late in the day when the track was at its best.
"I was really excited to get my first taste of the new MR03 and I like it a lot!" the Frenchman enthused.
"The car feels great to drive and I'm pleased that I was able to achieve some good mileage.
"You always want more, of course, but there is a lot to work through and understand, so we have to be patient and go through the programme in the right way, especially as we have had damp conditions to contend with also.
"At the end, once we were happy with the systems work, it was nice to put the slicks on and start putting some laps together.
"It is early days but we were quite happy with the pace in the conditions and for our programme. Not a bad start."