Fabio Onidi, Marco Bonanomi and Will Bratt will all test for GP2 team Coloni Motorsport at Jerez next month.
The trio will receive the test in preparation for one of them earning a fully funded GP2 Asia Series campaign with the Italian team this winter.
The drive will be the prize for winning the Euroseries 3000 championship, in which they are currently covered by just six points in first, second and third places.
The test at Jerez will take place on October 6-8.