Caterham's race drivers Giedo van der Garde and Charles Pic will take over from Alexander Rossi and Will Stevens for the final day of the Young Driver Test which begins at Silverstone tomorrow.
Van der Garde and Pic will take advantage of the chance to test Pirelli tyres at the Northamptonshire circuit on Friday.
Caterham reserve driver Rossi took part in the FP1 session during the Canadian Grand Prix in early June and will be on track tomorrow.
Fellow Caterham Racing Academy product Stevens, currently fourth in the Formula Renault 3.5 championship standings, will get his first chance behind the wheel of the CT03 on Thursday.
Rossi said: "We have a busy workload ahead of us and I'm pleased I can both add this as another step in my development as an F1 driver, and help the team continue the push for the second half of the F1 season."
Stevens added: "I spent quite a bit of time last week in the simulator so I'm comfortable with most of the systems I'll be working with and, while obviously nothing can really prepare you for the first time you drive an F1 car, I'm as ready as I can be."