Red Bull have confirmed that Daniel Ricciardo and Max Verstappen will drive during the two-day in-season test at the Circuit de Barcelona-Catalunya on Tuesday and Wednesday, completing the full driver line-up.
Although the majority of teams will run a young driver (classed as a driver who has competed in three or less grands prix), Red Bull and Haas will run their race drivers.
As per the regulations, teams must run a young driver on at least two of the four in-season test days. A second two-day test will take place after the British GP, meaning both Haas and Red Bull will be required to run a junior on both days.
Mercedes and Renault will share Esteban Ocon, with the DTM racer first driving for Renault on Tuesday before taking over from Nico Rosberg on Wednesday.
Ferrari have decided to draft in Sebastian Vettel in an attempt to better understand their lack of pace during qualifying for the Spanish GP at the weekend, whilst Force India will run Alfonso Celis on both days.
Sauber have opted to skip the test, citing a lack of upgrades and the requirement to run a young driver.
Full driver line-up:
| Team | Tuesday | Wednesday |
| Mercedes | Nico Rosberg | Esteban Ocon |
| Ferrari | Sebastian Vettel | Antonio Fuoco |
| Red Bull | Daniel Ricciardo | Max Verstappen |
| Williams | Alex Lynn | Felipe Massa |
| Renault | Esteban Ocon | Kevin Magnussen |
| Toro Rosso | Pierre Gasly | Daniil Kvyat |
| Force India | Alfonso Celis | Alfonso Celis |
| McLaren | Jenson Button | Stefan Vandoorne |
| Manor | Pascal Wehrlein | Jordan King |
| Haas | Romain Grosjean | Esteban Gutierrez |
