Adrian Sutil clocked the second quickest time of the day to round off Force India's four-day testing at the Circuit de Jerez in Jerez, Spain.
In between running through system checks, set-up evaluation and tyre comparisons, the youngster posted his best lap of 1:20.180 which was just half a second behind his pal and McLaren driver Lewis Hamilton.
"We did some really good runs, concentrating mainly on getting as much experience as we could with the new tyres," Sutil later said.
"Set-up wise, we were pretty good already and the car balance is not so far away. We also tried a couple of longer runs and saving the tyres seems to be the key point. We weren't going for a time, just trying to get as much information as possible at this stage to feed back into the programme for next week," explained the German.
Sutil completed 84 laps of the Spanish track on Saturday to bring Force India's total test mileage to more than 1,200km.
Chief race engineer Dominic Harlow said the testing went just as expected and there was no reason to complain.
"We completed the final day of the test with a greater mileage than the previous days despite some poor weather to begin with and a planned period of downtime, which is positive," he said.
"It's been a good first test with the VJM3 confirming the base characteristics of the car and the most prominent effects of the regulation changes for 2010," Harlow said.
Testing resumes next week again in Jerez from February 17-20 and Paul di Resta will get his first outing in the VJM03 on Wednesday before Sutil and Antonio Liuzzi take over for the remainder of the test.