Female racing driver Susie Wolff has been appointed as the official test pilot for Williams, the Formula One team announced on Friday.
Wolff, who was previously Williams' development driver, succeeds Felipe Nasr, who will drive for Sauber in the 2015 season.
"This is another step in the right direction for me," said Wolff, who this year became the first woman to drive at a grand prix weekend for two decades by taking part in first practice in Britain and Germany.
"I am delighted Williams are recognising my progression, hard work, and it is performance that counts.
"Williams is at a very exciting stage in its history and we are moving into 2015 with fantastic momentum. I'm proud to be part of the team."
Wolff, 31, is scheduled to take part in two first practice sessions at races that are yet to be determined and two test days, as well as carrying out extensive simulator testing.
Meanwhile, should either Felipe Massa or Valtteri Bottas have to sit out a race for any reason, the Scot would be expected to deputise.
"She continues to impress us with her strong technical knowledge, feedback she delivers and the performance when she drives the car both on the track and in the simulator," said deputy team principal Claire Williams.
"She has steadily increased her time behind the wheel since she joined us in April 2012 and her appointment as official test driver was a natural progression."