Toro Rosso has confirmed Formula 2 driver Sean Gelael will drive for the team in four of the next six FP1 sessions.
The Indonesian drove for Toro Rosso at the post-Bahrain and Hungarian tests earlier in the year. He will get the opportunity to drive the STR12 in FP1 at the Singapore, Malaysian, United States and Mexican rounds of the season.
The team has yet to confirm which full-time driver, Carlos Sainz or Daniil Kvyat, will be replaced during the sessions.
"What an amazing opportunity! First of all, I want to thank everyone who made this possible and most importantly for the belief they have shown in me,'' Gelael said.