Caterham team principal Cyril Abiteboul says he is pleased with the input made by new signing Kamui Kobayashi.
Former Toyota and Sauber driver Kobayashi joined Caterham in January having spent 2013 in the World Endurance Championship.
Like several teams, Caterham has endured difficulties during pre-season testing as the CT05 encountered technical issues. But Abiteboul is upbeat about the progress made by Kobayashi and his team-mate Marcus Ericsson.
"I’m very pleased with how all three drivers we have run in the tests have integrated with the team. As a rookie, Marcus is on a steep learning curve but he has shown consistently that he improves with every lap and is ready for his first full F1 race weekend in Australia in two weeks.
"Kamui has shown exactly why we are so pleased to have him with us. He sets the benchmark for us, both in terms of outright pace and in his feedback, and he and Marcus are going to be a good pairing this season."
Abiteboul was also enthusiastic about reserve driver Robin Frijns, who tested the CT05 on two of the 12 days of testing.
"Robin, who ran for one day in both the first and second tests, has already demonstrated his ability, both behind the wheel and as a teammate," he added.
Abiteboul believes that his team has made progress compared to this time in 2013.
"It has certainly been as tough a pre-season as we expected, but to finish as by far the most reliable Renault powered team, and with some early indications that our relative performance has improved compared to this time last year is positive."