Israeli driver Roy Nissany will have a day of pre-season testing and take part in three Friday practice sessions for Williams this season.
Nissany, 26, ended up 19th in Formula Two last year after finishing 22nd in 2019 but Williams, who changed ownership last August, said he would continue in the role of official test driver.
He took part in free practice in the Spanish, Italian and Bahrain Grands Prix last year as well as the post-season test in Abu Dhabi.
Singapore Grand Prix
Perez wins Singapore Grand Prix despite investigation for safety car infringement
02/10/2022 AT 12:37
"As a team, we were very happy with the contributions Roy made both through his work on-track and in the simulator at Grove, which all aided the lap time gains we were able to make with the FW43," team boss Simon Roberts said in a statement.
The former champions failed to score a point last year, finishing last overall. The season begins in Bahrain on March 28.
Singapore Grand Prix
Albon to race in Singapore after recovering from appendicitis
28/09/2022 AT 17:20
Formula 1
Alpine boss open to Ricciardo return after Piastri drama
08/08/2022 AT 08:10