Romain Grosjean will conduct Pirelli's next Formula 1 test at Monza next week after being drafted in as replacement for Nick Heidfeld.
The Franco-Swiss driver, who has most recently raced in GP2 after an aborted switch to sports cars earlier this year, is believed to have already had his seat fitting in the Toyota TF109 that Pirelli is using for its preliminary tests.
Heidfeld had been appointed as Pirelli's official development driver after getting a release from his Mercedes GP test role, but has now quit that position after securing a race seat with Sauber. His last run with the team was at Jerez in Spain this week.
A number of drivers had been linked with the Pirelli role, including Pedro de la Rosa, but Grosjean has been given the nod for next week's Monza running.
The agreement with Grosjean is just for next week's test so far, with a decision on who drives beyond that waiting until after the running is complete.