Frenchman Pierre Gasly, one of Red Bull's brightest talents, will test for Toro Rosso at Barcelona on May 10 after the Spanish Grand Prix.
The 19-year-old, who finished runner-up to Carlos Sainz Jr in Formula Renault 3.5 last year and appeared in the running for a race seat with Red Bull's junior squad before Max Verstappen's nomination, will enjoy his first running in an F1 car.
Gasly's current 2015 schedule includes the GP2 series with DAMS where he will race alongside British hopeful and Williams test driver Alex Lynn.
Barcelona will be the first of two in-season tests scheduled this year, the second one taking place in Austria on June 22.
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