Ferrari junior Robert Shwartzman recorded the fastest time on the final day of pre-season FIA Formula 3 testing at the Hungaroring.
Shwartzman's benchmark, a 1m30.746s, was almost seven tenths quicker than the lap managed by his Prema team-mate and fellow Scuderia protege Marcus Armstrong on the first day of the test Wednesday.
SMP-backed Russian racer Shwartzman pipped Renault junior Christian Lundgaard (ART Grand Prix) to top spot on Thursday by two tenths of a second in the final hour of the morning session.
Another Prema driver - European F3 graduate Jehan Daruvala - completed the top three, lapping just under a tenth slower than Lundgaard.
Armstrong made it three Prema entrants in the top four, and was one of 12 drivers to go faster than his Wednesday benchmark in the Thursday morning session.
New Red Bull junior Yuki Tsunoda was fifth for Jenzer, ahead of the second ART-run car of David Beckmann and Jake Hughes, the fastest HWA Racelab entrant.
Raoul Hyman, representing the Charouz-run Sauber Junior Team, was 0.006 seconds slower than Hughes in eighth.
Tsunoda's fellow Red Bull juniors Liam Lawson (MP Motorsport) and Juri Vips (Hitech GP) were ninth and 11th respectively, split by Renault protege Max Fewtrell (ART Grand Prix).
Vips caused one of the day's several red-flag interruptions by stopping on-track in the final hour of running.
The best lap times in the afternoon session were more than a second slower, with Tsunoda leading the way from Carlin's Felipe Drugovich and Shwartzman.
Shwartzman's test-topping time means three different teams have been quickest in F3's three pre-season tests.
Lundgaard set the pace at the opening Paul Ricard test for ART, and Hitech's Leonardo Pulcini - a spot behind team-mate Vips in 12th on Thursday - led the way at Barcelona.
The season will kick off at Barcelona on May 11-12, in support of Formula 1's Spanish Grand Prix.