Daniel Ricciardo says it is too early to be frustrated by the problems his Red Bull team is having with the Renault Formula One power unit.
Ricciardo had a slow start to the Barcelona test today, not setting a laptime until the final hour of the morning session.
He went on to finish as third fastest, however, and said Renault is making progress with its power unit despite the glitches seen so far.
"It's still too early to get frustrated. I'm not frustrated," Ricciardo told reporters after the session.
"Testing is a bit frustrating in general. I just want to go racing.
"I think by Melbourne we'll be there. And then if in the first few races we are not there then maybe it gets a bit frustrating, but it's definitely too early to be pessimistic."
Big problems 'seem to be solved'
The Australian covered 59 laps today, and insisted things will get better once the team and Renault can get everything out of the power unit.
"I think the bigger problems seem to be solved today, now it's just sort of fine-tuning and get it a bit more driveable, get the power down when we need it, etc," he said.
"But in terms of global problems it was okay. For sure we didn't do 100 laps, but we didn't have to go through any engine changes or anything like Jerez. We are definitely making progress.
"I feel there is more power there to be used. Now we are just trying to mold it to a point where we can use it in the right places."
He added: "I think for sure we are still fine-tuning. We are not were we want to be yet with the engine and driveability and all that, but at the same time we didn't really expect to be there yet.
"I think we knew it would take a bit of time. I think we are where we thought we would be. I think maybe some others are a fit further up for now, but I think come Melbourne we'll be there."