Fernando Alonso says he is encouraged by Ferrari's progress but stressed that he is unsure where the team sits in relation to their rivals.
Alonso completed 122 laps on the second day of the third test in Bahrain and set the second quickest time.
"Six hundred kilometres are always welcome, but it’s still too early to say we are a hundred percent ready for Melbourne," said Alonso."
"We still have a lot to learn, but I am happy with the way the day went."
"In the morning, we did some set-up work which taught us what was the best direction to go in, while in the afternoon, we managed to complete a race simulation and every lap we did can be added to the learning phase, which is the normal situation to be in during winter testing."
"On the performance front, it’s still difficult to have a clear idea of what our rivals are up to and I think we will only find that out in Australia."
Alonso's Ferrari team-mate Kimi Raikkonen will drive the F14 T on Saturday.