Nick Yelloly posted the quickest time on the opening day of the second GP3 test for 2014 at the Jerez circuit.
The Status GP driver finished on top of the times with a best lap of 1m31.350s, recorded in the morning session, where the quickest four laps of the day were set.
Carlin's Alex Lynn finished in second behind Yelloly ahead of Korainen's Santiago Urrutia and Dino Zamparelli in the ART car.
Lynn's team-mate Emil Bernstorff was fifth quickest on the day with the fastest time of the afternoon session.
The test marked the first appeared for the Hilmer team after having taking over the Russian Time entry.
The team, which had missed the first pre-season test, ran Nelson Mason and Ivan Taranov, the former causing a red flag in the afternoon when he stopped on track.
Jenzer's Christopher Hoher had caused the first stoppage in the morning with a spin, while Patrick Kujala in the Manor car forced another stoppage with five minutes remaining, meaning the session came to an early finish.
The test continues on Friday.
Combined Thursday times:
Pos Driver Team Time Gap Laps
1. Nick Yelloly Status 1m31.350s 65
2. Alex Lynn Carlin 1m31.594s +0.244s 52
3. Santiago Urrutia Koiranen 1m31.931s +0.581s 47
4. Dino Zamparelli ART 1m32.130s +0.780s 63
5. Marvin Kirchhofer ART 1m32.237s +0.887s 67
6. Richie Stanaway Status 1m32.354s +1.004s 63
7. Alex Fontana ART 1m32.227s +0.877s 63
8. Jann Mardenborough Arden 1m32.504s +1.154s 54
9. Pal Varhaug Jenzer 1m32.450s +1.100s 48
10. Patrick Kujala Manor 1m32.653s +1.303s 55
11. Patric Niederhauser Arden 1m32.687s +1.337s 63
12. Luis Sa Silva Carlin 1m32.726s +1.376s 64
13. Emil Bernstorff Carlin 1m32.205s +0.855s 58
14. Robert Visoiu Arden 1m32.763s +1.413s 57
15. Jimmy Eriksson Koiranen 1m32.283s +0.933s 41
16. Nelson Mason Hilmer 1m33.097s +1.747s 37
17. Dean Stoneman Manor 1m33.119s +1.769s 53
18. Ryan Cullen Manor 1m33.426s +2.076s 74
19. Alfonso Celis Jr Status 1m33.726s +2.376s 66
20. Roman de Beer Trident 1m33.712s +2.362s 44
21. Adderly Fong Jenzer 1m33.210s +1.860s 54
22. Christopher Hoher Jenzer 1m34.243s +2.893s 65
23. Ivan Taranov Hilmer 1m34.557s +3.207s 54
24. Denis Nagulin Trident 1m34.469s +3.119s 49
25. Victor Carbone Trident 1m35.743s +4.393s 54
26. Carmen Jorda Koiranen 1m36.410s +5.060s 42