Red Bull has announced it will use both of its race drivers during the post-race test at the Circuit de Barcelona-Catalunya this week.
The majority of teams are staying on to run on Tuesday and Wednesday following the Spanish Grand Prix, with only Sauber not taking part in the test. With four days of in-season testing in total - the second test takes place after the British Grand Prix - regulations dictate teams must run drivers who have started no more than two grands prix on two days.
Red Bull has opted to use Daniel Ricciardo and Max Verstappen for this week's test, where Renault will be trialling its B-spec power unit ahead of planned implementation in Canada. Ricciardo will run on Tuesday before Spanish Grand Prix winner Verstappen takes over on Wednesday.
The schedule means Red Bull will have to run a rookie driver for both days of the Silverstone test in July, with GP2 championship leader Pierre Gasly expected to get further track time.