Michael Schumacher signed off from his Mugello testing duties insisting that Mercedes have learned a lot about their car so far.
After being limited to just five laps on day one due to heavy rain at the Tuscany track, Schumacher made up for lost time on Wednesday as he completed 144 laps.
Although his best effort - a 1:23.404 - was only good enough for the eighth best time of the day, the seven-time World Champion feels the team achieved plenty on the day.
"In the past, I have done so many kilometres on this beautiful track, and today I think I can say I was adding quite some more," he told the official Mercedes website.
"Unlike yesterday, we were able to gather really a lot of data, and like this we are learning more and more about our car which is absolutely positive.
"Of course we also tested some new things, which I would not want to go into detail about, so it is definitely worth coming here at this stage of the season.
"I am really happy with how things are proceeding with our car and our team, and I am convinced we have a good basis for the final day of the test tomorrow."