Sato will test for the Ferrari-powered outfit at Jerez on September 18, the day after Swiss driver Sebastien Buemi.

Buemi , who is currently racing in the GP2 feeder series is Red Bull Racing's test and reserve driver.

Tost added: "The test will give us an opportunity to evaluate Buemi and Sato at the same time, as they are both possible candidates for a 2009 seat."

Sato has been out of F1 since his Super Aguri team folded in May.

"It will be especially interesting working with a team that has made so much progress over the course of the year," he said.