Thursday marked the final day of testing at Barcelona for this week. Ralf Schumacher, at the wheel of the new FW21 headed the time sheet just ahead of team mate Alex Zanardi. Pedro de la Rosa was 3rd quickest for arrows with Pedro Diniz 4th for Sauber. McLaren left the circuit early and did not take part in the final day. The times where as follows:

Unofficial times
Schumacher.R (Williams)	1:23.14	31 laps
Zanardi (Williams)	1:23.81	33 laps
de la Rosa (Arrows)	1:24.70	14 laps
Diniz (Sauber)	1:24.76	34 laps