Jehan Daruvala tested for McLaren last month at Silverstone and will undertake another two days of testing with the papaya squad on Monday and Tuesday at Portimao.
It's unclear why McLaren has granted the Indian racer several outings onboard its 2021 MCL35M as the 23-year-old is supported by Red Bull.
But the tests are perhaps part of a personal programme set up by Daruvala.
McLaren's test team has been on site at Portimao since last week where it ran IndyCar star Colton Herta and sim driver Will Stevens.
"My first taste of Formula 1 machinery was surreal and I can’t wait to get back in the car again in Portimao," commented Daruvala.
"I came away from the Silverstone test with a lot of confidence as both from a driving and physical perspective I did well and covered more than two race distances absolutely trouble-free.
"My dream has always been to race in Formula 1 and this test will build on what we achieved at Silverstone."
A three-time winner in the FIA Formula 2 Championship in which he has raced since 2020, Daruvala currently sits fourth in the series standings with Prema Racing.
Keep up to date with all the F1 news via Facebook and Twitter
For much of 2025, the paddock conversation around Sergio Perez was surprisingly straightforward: a driver…
Flavio Briatore is not a man accustomed to standing on the sidelines of victory, nor…
Richie Ginther was born on this day in 1930. A glance at the American F1…
Victory at last! After enduring a frustrating season plagued by mechanical failures and unavoidable…
Mika Hakkinen has urged McLaren to resist the temptation of making a blockbuster move for…
Long-serving Aston Martin engineer Tim McCullough is reportedly set to leave the team at the…