Felipe Massa took over from Kimi Raikkonen at Mugello on Wednesday to continue the development work on the new Ferrari F60.
However, while the weather was slightly better than on the previous two days, the track remained damp throughout, preventing the use of Bridgestone's slick tyres. In the end Massa managed 104 tours - around 550 kilometres.
His quickest lap was a 1 minute 33.353 seconds, which was six tenths up on Kimi's best [a 1m 33.920s], although conditions on days 1 and 2 weren't so good.
Testing now resumes on Thursday, again with Massa behind the wheel for the Scuderia.