GP2 racers Jordan King and Rio Haryanto will drive for Manor during next week's post-race tyre test at the Yas Marina Circuit in Abu Dhabi.
King, who acts as Manor's development driver, will get behind the wheel of a Formula 1 car for the first time while Haryanto will have another outing with the team, having sampled its machinery in 2010 and 2012.
Each driver will receive half a day's worth of running on Tuesday.
"We look forward to providing Rio and Jordan with the opportunity to drive the MR03B in Abu Dhabi next week," said outgoing team boss John Booth.
"For Jordan, this is a planned part of his 2015 role as Development Driver, following a season spent with the team in an educational capacity.
"Rio has of course driven two of our cars in previous tests. In 2010, he was considered to be at the very tender age of 17 years old, but we knew he had an exciting future ahead of him.
"Both drivers have extensive experience of running Pirelli tyres in GP2, and specifically the many GP2 tests that have been held in Abu Dhabi, so this leaves them well placed to help us play our part in Pirelli’s evaluation programme next week."