Jenson ButtonJenson Button has revealed that he will drive a McLaren for the first time at Valencia on Feb. 3, the last of the three-day test. Pedro de la Rosa will give the MP4-25 its initial run on the opening day of the test on Feb. 1, with Lewis Hamilton taking over the following day.

"I am testing on Feb. 3," Button at the AUTOSPORT International show. "The first day is Pedro, then Lewis, and myself on the third day.

"I am looking forward to it. It's going to be the strangest day because it's going to be one of the most important days in F1 in 2010, when we see where people stand, which cars are quick and which are competitive."

De la Rosa's involvement in the test suggests that he will continue as a McLaren test driver in 2010, despite recent speculation linking with the Sauber team.