Fernando Alonso believes that McLaren must improve before competing in next month's Australian Grand Prix.
The Woking-based constructor were restricted to just 59 laps of running at the second pre-season test in Barcelona, due to problems with the car's ERS system.
However, Alonso is adamant that the team must start performing better before they take to the track in Melbourne.
He told reporters: "We're now exactly halfway through the test programme, and we need to make some progress. There are positives from the day, but we did the fewest laps of any team today, and need to raise our game and learn as fast as we can. Australia is approaching fast.
"We will arrive to Australia hoping Australia was in June or July, but it's in March and I don't know if we will arrive completely ready. But what I'm sure is we'll arrive in the best conditions we can.
"There are only six days of testing between now and Australia, so it's time for us to raise our game and start learning about the car. Today we had some new parts and re-enforced parts for the problems we had; tomorrow there are more coming."
Alonso recorded the fifth-fastest time of the day, with Red Bull's Daniel Ricciardo topping the timesheets on day two at the Circuit de Catalunya.
