Gary Paffett has extended his test and reserve driver contract with McLaren into next season, the Woking-based team announced on Tuesday.
Paffett joined McLaren back in 2005 and he has helped play a major role in car development – which has included both proper testing and extensive simulator work.
Speaking about his new deal, Paffett said: "I'm extremely pleased to have renewed my relationship with Vodafone McLaren Mercedes. As everybody knows, success in Formula 1 is developed through the strength and duration of relationships: I've been a part of this team for more than five years, and it's a place where I really feel happy and comfortable, and where I can confidently speak my mind.
"I'm proud that my contribution has enabled the team to remain a race and championship-winning force in Formula 1, and I truly believe that we'll continue to grow and improve in the future."
Team principal Martin Whitmarsh added: "Gary has become a vital part of our technical support and development team – both at the track and in the simulator.
"Both Gary and the team believes that this deal will underline his reputation as a strong development driver and a true team player."
Paffett has worked alongside Pedro de la Rosa this season, with the Spaniard rejoining the team at the start of this year after a spell as Sauber racer and Pirelli tester.