It was a different story in Portugal and Italy, however, where five other teams were at work.
The worst weather fell on Portimao on the southern coast of Portugal, where the extreme rain and even hail was at times considered to be dangerous, according to McLaren.
Toyota and Williams were also trying to put miles on their brand new cars, but Nelson Piquet was the least productive, doing less than ten laps before Renault's new R29 stopped on track with a technical problem.
It was a similar although less extreme story at Mugello, where Ferrari's Kimi Raikkonen found a wet track throughout his second day of testing in the F60.
"All the same, first impressions are positive and, above all, it's important that we didn't have any particular technical problems," said the Finn.