Prior to the 2004 Chinese Grand Prix, it was announced that Doornbos would be the official Friday test driver for the Jordan Formula One team, replacing Timo Glock, who had been promoted to race duties in place of Giorgio Pantano, whose sponsorship money had "dried up". Doornbos impressed as test driver for the final few races of the season, and was reappointed with the newly-sold Jordan team for the 2005 season.