Brawn happy despite rain
"The past two weeks in Jerez have seen an intensive period of testing for the team," said Brawn.
"It is very pleasing to have ended the test program with two days of very valuable dry running for Nico and Michael.
"Although the conditions haven't been ideal over the two tests, we have been able to make good progress on the set-up of the car and completed a number of our systems evaluations.
"We still have a great deal of work ahead of us in Barcelona next week, but overall we're looking in good shape for the start of the season."
Rosberg, who was in action on the final day on Saturday, added: "We've made some good progress on our set-up comparisons and learnt a lot which will be useful to prepare for the final test in Barcelona.
"Being able to get the laps in dry conditions has been very helpful for me to get used to the car and systems."