Jaime Alguersuari was a highly impressive fourth quickest at the wheel of the new Toro Rosso
STR5 as he had chance to sample the car for the first time, with the team experiencing none of the gearbox gremlins that had affected Sebastien Buemi's running earlier in the week.
The youngster was able to end the day ahead of reigning F1 champion Jenson Button, who took fifth on the times during his much-anticipated debut for McLaren. The Briton spend much of the morning working with the team in the garage to get comfortable in the car before he completed a series of longer runs in the MP4-25 during the afternoon.
Vitaly Petrov's first outing in an F1 car ended with the new Renault
driver posting the sixth quickest time, while Williams' Nico Hulkenberg
was seventh on his first outing on the year after taking over from team-mate Rubens Barrichello.
The team's now head for Jerez, where the second test of pre-season will take place next week.
To view times from the final day, CLICK HERE
To view the combined times from Valencia, CLICK HERE