Teams will conduct the first of four in-season tests at the circuit on Tuesday and Wednesday next week.
The team said Sirotkin will drive the C33 on Tuesday in order to complete enough mileage to be granted a superlicence. He previously did a demonstration run for the team in Sochi, where the inaugural Russian Grand Prix will be held later this year.
Test driver Giedo van der Garde will do the other day of testing and will also drive during first practice for the Bahrain Grand Prix on Friday.
Head of track engineering Giampaolo Dall’Ara admitted the team still have progress to make with their new car:
“We went testing in Bahrain twice before the start of the season and were not happy with the performance of the car, which had a lot to do with a lack of straightline speed and some issues under braking.
“Since then we have improved the car in different areas, particularly under braking. In addition, the performance in medium and high speed corners is quite good as well.
“However, we still have room for improvement in low speed corners, and the straightline speed is still an issue.”
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Image © Sauber