Trident have revealed today that Nathanaël Berthon and Robin Frijns will join them for the first pre-season test session which will take place next week at Jerez de la Frontera, Spain.
Twenty-three year old Frenchman Berthon returns to GP2 after a strong rookie season which saw him score two podium finishes.
Dutchman Frijns - also twenty-three years old and who has been confirmed as Sauber F1 third driver earlier this year - will debut in GP2 on the Spanish track.