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Sauber's new car is expected to hit the track for the first time on 14 February.
France's L'Equipe reports that the Swiss team will give its 2019 car a shakedown at Ferrari's private test circuit at Fiorano.
READ: Kimi Raikkonen's move means 'Sauber is now Ferrari' - Bernie Ecclestone
The first outing for the Ferrari-powered, Alfa Romeo-sponsored Sauber team will take place on the same day as the launch of McLaren's 2019 car.
Official winter testing will commence in Barcelona from 18 February.