Manor rookie Rio Haryanto knows he needs to learn quickly from his mistakes after being involved in his first crash in Formula 1.
After spinning on his first day on Wednesday, Haryanto "ran a little bit too hot into Turn 4" at Barcelona's Catalunya circuit on Thursday as he tried to find the limits of the MRT05.
It resulted in the car spinning into the tyre wall and sustaining rear-wing damage, bringing his running to an end with two and a half hours of the day remaining.
With just four days of testing overall before he makes his grand prix debut in Australia next month, the 23-year-old Indonesian is aware has to swiftly find his feet.
"I am here pushing to get the maximum out of myself and the car. You saw today I made a mistake. I have to learn from that, and not repeat it again the next time," said Haryanto.
"But I'm getting more confident with the team, and my relationship with the engineers is improving day by day.
"I'm learning, and there are two more days for me, so I'll try to do my best, to learn as much as I can before the first grand prix.
"Hopefully by the end of the tests next week I'll feel a lot more comfortable.
"Yesterday I was still learning a lot with the team, but today I felt there was a step.
"Day by day I will get used to it, which is why I believe there is a lot more to come from me because I am still very new to the car."
With an all-rookie line-up, as Pascal Wehrlein partners Haryanto, Manor faces a tricky balancing act in that its drivers need time to get up to speed while the team needs to learn quickly about the car.
Racing director Dave Ryan remains unconcerned.
"Obviously Pascal has come in from winning the [DTM] championship," he said.
"He's done a lot of mileage in a Formula 1 car, and the class car on the grid, so he has a lot of experience, and he knows what to expect.
"So for him it's probably been the transition to Manor that has been the bigger issue.
"Rio on the other hand is the opposite. He's making the move up for the first time, so pretty different approaches.
"But both are great kids and it's good having them around. I'm enjoying it."