Estonia's Marko Asmer has joined Williams as a Formula One test driver for the rest of the year.
Asmer will be spending more time behind the wheel at Williams
Williams said they had retained Asmer, 19, for future testing duties in 2003, with an option on his services for 2004.
The Formula Ford driver carried out straight-line testing at Vairano in Italy earlier in the year and also tested for Williams in Barcelona in July.
"Marko proved himself to be a keen and competent worker in
the car, providing us with some great feedback," said chief operations engineer Sam Michael.
BMW-powered Williams are leading the constructors' championship with three races remaining.