Formula 3 driver and Mclaren junior Lando Norris is to drive the teams MCL32 the Hungary test alongside Stoffel Vandoorne.
The 17-year-old joined Mclaren this year and has already driven an MP4-26 at Algarve.
He will take the wheel of a 2017 challenger for the first time as part of his prize for winning the 2016 Mclaren Autosport BRDC award.
He will drive on the second day of the test taking over from Vandoorne.