Mike Conway and Marcus Ericsson will test with the Brawn/Mercedes team at next week's three-day young driver session at Jerez.
The news was not announced by the Brackley based team but instead published on an itinerary issued by the Spanish circuit.
26-year-old Briton Conway is an Indycar driver who has tested in the past with Brawn's predecessor Honda.
Swede Ericsson, 19, is the new champion of Japanese F3, who recently made his GP2 debut in the Asian series.
He began his single seater career in 2007 by winning the Formula BMW UK championship.
The Jerez itinerary did not shed any light on McLaren's testing plans, but it is expected that Gary Paffett will be driving.
