GP2 veteran Stefano Coletti set the pace on the final day of pre-season testing at Barcelona on Thursday.
The Rapax driver came out on top during a flurry of activity in the morning session, as most drivers ran the soft tyre compound once the track had dried out.
Coletti was also one of the leading runners in the slower afternoon session, setting the second fastest time on the hard tyre as Felipe Nasr led the way with a soft compound run.
Marcus Ericsson, who had been setting the pace before Coletti's run in the morning, ended the day with the second fastest time overall.
Nasr's afternoon lap was good enough for third on the day, while the top five was completed by Stephane Richelmi and Jolyon Palmer.
Only 25 of the 26 cars featured on track for the final day of the test, as Trident ran a sole car for Rodolfo Gonzalez.
The Italian team had planned not to run at all as Gonzalez initially felt too ill to drive. It did not have a driver for its second car either as Formula Renault 3.5 champion Robin Frijns switched to new team Russian Time, and Nathanael Berthon, who Frijns had filled in for on the first two days, continued to be sidelined by contractual issues.
The GP2 season kicks off at Sepang, where it will support the Malaysian Grand Prix on March 22-24.
Morning session: Pos Driver Team Time Gap Laps 1. Stefano Coletti Rapax 1m29.055s 30 2. Marcus Ericsson DAMS 1m29.217s + 0.162s 35 3. Stephane Richelmi DAMS 1m29.453s + 0.398s 39 4. Jolyon Palmer Carlin 1m29.467s + 0.412s 28 5. Sergio Canamasas Caterham 1m29.611s + 0.556s 36 6. James Calado ART 1m29.624s + 0.569s 33 7. Kevin Giovesi Lazarus 1m29.812s + 0.757s 32 8. Mitch Evans Arden 1m29.902s + 0.847s 34 9. Daniel Abt ART 1m29.994s + 0.939s 30 10. Adrian Quaife-Hobbs MP 1m30.012s + 0.957s 23 11. Daniel de Jong MP 1m30.037s + 0.982s 26 12. Robin Frijns Russian Time 1m30.168s + 1.113s 24 13. Fabio Leimer Racing Engineering 1m30.244s + 1.189s 22 14. Pal Varhaug Hilmer 1m30.300s + 1.245s 26 15. Felipe Nasr Carlin 1m30.459s + 1.404s 27 16. Rene Binder Lazarus 1m30.484s + 1.429s 19 17. Jake Rosenzweig Addax 1m30.620s + 1.565s 16 18. Johnny Cecotto Arden 1m30.635s + 1.580s 31 19. Simon Trummer Rapax 1m30.667s + 1.612s 28 20. Riccardo Agostini Hilmer 1m30.724s + 1.669s 35 21. Rio Haryanto Addax 1m30.813s + 1.758s 29 22. Tom Dillmann Russian Time 1m30.855s + 1.800s 27 23. Rodolfo Gonzalez Trident 1m31.029s + 1.974s 13 24. Ma Qing Hua Caterham 1m31.035s + 1.980s 32 25. Julian Leal Racing Engineering 1m31.220s + 2.165s 14 Afternoon session: Pos Driver Team Time Gap Laps 1. Felipe Nasr Carlin 1m29.381s 46 2. Stefano Coletti Rapax 1m29.414s + 0.033s 28 3. Tom Dillmann Russian Time 1m29.843s + 0.462s 37 4. Fabio Leimer Racing Engineering 1m29.862s + 0.481s 30 5. Adrian Quaife-Hobbs MP 1m29.914s + 0.533s 39 6. Robin Frijns Russian Time 1m30.053s + 0.672s 29 7. James Calado ART 1m30.256s + 0.875s 55 8. Kevin Giovesi Lazarus 1m30.318s + 0.937s 33 9. Mitch Evans Arden 1m30.324s + 0.943s 34 10. Conor Daly Hilmer 1m30.417s + 1.036s 37 11. Daniel de Jong MP 1m30.441s + 1.060s 29 12. Rene Binder Lazarus 1m30.454s + 1.073s 28 13. Pal Varhaug Hilmer 1m30.554s + 1.173s 41 14. Julian Leal Racing Engineering 1m30.601s + 1.220s 36 15. Stephane Richelmi DAMS 1m30.643s + 1.262s 40 16. Daniel Abt ART 1m30.721s + 1.340s 52 17. Sergio Canamasas Caterham 1m30.813s + 1.432s 54 18. Johnny Cecotto Arden 1m30.821s + 1.440s 33 19. Marcus Ericsson DAMS 1m30.823s + 1.442s 40 20. Simon Trummer Rapax 1m30.884s + 1.503s 43 21. Jolyon Palmer Carlin 1m30.918s + 1.537s 28 22. Rio Haryanto Addax 1m30.997s + 1.616s 42 23. Jake Rosenzweig Addax 1m31.271s + 1.890s 38 24. Rodolfo Gonzalez Trident 1m31.368s + 1.987s 37 25. Ma Qing Hua Caterham 1m31.370s + 1.989s 53