Lance Stroll will replace Felipe Massa on Day One of the post-Hungarian Grand Prix test as the Brazilian continues to recover from illness.
Massa fell ill on the Friday of the Hungarian GP weekend and was taken to a local hospital for checks before being released that same night.
He was given the go-ahead to contest FP3 but withdrew from the race weekend soon after, citing illness.
Massa returned home to recuperate and will miss a day of testing with Williams announcing that Stroll will instead drive on the opening day of the two-day test.
The rookie will be in the car on Day One before Formula 2 racer Luca Ghiotto takes over on Day Two.
Experience the full coverage of the FIA Formula One season throughout 2017 on FOX Sports Play, where you can watch LIVE races from angles, unlike any other, highlights, interviews, behind the scenes and much more. Don’t miss it!