"It's nice to get to the end of the test having had a fault-free and productive two days with Valtteri," explained Trackside Engineering Director, Andrew Shovlin.
"It's also the last proper laps we will do with the W09. We have a lot of good memories working with this car over the last season, it certainly hasn't been easy but the racing has been great fun and it's a year we won't forgot for a long time.
"We've spent the day focussing on longer runs and characterising the compounds so that we can start work on our tyre selection for the early races.
"We also did some more comparisons of the 2018 to 2019 casings and have furthered our learning from yesterday.
"We've got a lot of work to do back at base to go through all the data that we've collected and make sure we're well prepared for the early races next year. Finally, I'd like to thank everyone who has stayed for the test and worked so hard to make it a success."