Yamaha will use the fourth of its five days of private MotoGP testing for the 2017 season next week, with championship leader Maverick Vinales and Valentino Rossi.
After this weekend's Catalunya Grand Prix, Yamaha is staying on for the official post-race test at Barcelona on Monday.
It will then relocate to Aragon, which hosts the 14th round of the campaign in September, for a day of private running for Vinales and Rossi on Wednesday.
The Aragon session will be Yamaha's fourth private test day in the 12-month window that starts after the Valencia season finale each year, in which five days with race riders are permitted.
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