Kamui Kobayashi says it was "good" to unlock some of his Caterham's performance even if his P6 time doesn't count for much.
Although a telemetry issue caused problems for the Japanese driver in the morning on Day Two in Bahrain, for the second day running Caterham were the busiest of the Renault powered teams.
Covering 66 laps, Kobayashi put in a very late dash to jump from tenth to sixth on the timesheets.
His 1:39.855 was, however, 4.945s short of Kevin Magnussen's P1 time in the McLaren.
"It was good to be back in the car and even though we had quite a few interruptions in the morning with a telemetry issue, we still completed 66 laps which is another useful day's work," he said.
"It's still too early to know where we really are, but being able to build the mileage every day is the only way we'll be able to get the most out of the car.
"Reliability is going to be so important this year, and it's good that the issues we've had here have been fixed well enough to allow us to keep running.
"It's also good to finish the day with a relatively quicker lap, but even though everyone knows lap times don't really mean anything in the tests, it's good for the team to start to see us unlocking some of the car's performance."