Jenson Button will openMcLaren's testing program at Jerez in Spain this week, the team has confirmed.
Button had his first tryout of the new MP4-25 on the final day of the Valencia test last week, and will get two days running from this Wednesday to get himself better acquainted with his new surroundings. Teammate Lewis Hamilton will drive on the final two days of the test, taking over the car from Friday onward.
Current weather forecasts suggest that Thursday may well be the only fully dry day of the test, with the week set to be hit by poor weather.