Kimi Raikkonen has ditched his red overalls and is back in Sauber overalls for today's post-season test at Yas Marina Circuit.
Raikkonen retired from Sunday's Grand Prix in Abu Dhabi, but just two days later he's back in action at the same track as all 10 teams stay on to carry out tyre testing for Pirelli.
It's the first time everyone will be trying out the manufacturer's 2019 compounds at the same time. And it's also the first opportunity for several drivers - like Raikkonen - who are changing teams over the winter to get their first taste of their new home.
Here's the complete line-up for Tuesday, November 27, the first of two days of testing at the 21-turn, 5.554km track. Lewis Hamilton set a time of 1:34.794s in qualifying at the weekend with Sebastian Vettel's 1:40.867s proving to be the fastest lap in the race itself.
Abu Dhabi post-season test - day 1
Mercedes: Valtteri Bottas
Valtteri Bottas missed out on a win in 2018 and is getting a head start on next year's campaign. With the Silver Arrows driver line-up one of few that are remaining unchanged, the Finn will be at the wheel of the Mercedes for both days of the test
Ferrari: Sebastian Vettel
After finishing runner-up on Sunday and in this year's championship, Sebastian Vettel takes charge of the Ferrari for day 1, but his new team mate for 2019 Charles Leclerc will take over tomorrow for the first time since his promotion from Sauber was announced.
Red Bull: Max Verstappen
Max Verstappen will be at the wheel for Red Bull on Tuesday. He also has a new team mate coming in next season, and Pierre Gasly will get his chance in the car on Wednesday. Departing driver Daniel Ricciardo will not be in action this week for either Red Bull or Renault.
Force India: Sergio Perez, Lance Stroll
Sergio Perez is first up for Force India on Tuesday morning, but he'll hand over the keys in the afternoon to Lance Stroll. The Canadian is yet to be formally announced as the team's driver for 2019 but it's just a matter of time. Stroll will have the car to himself on Wednesday
Williams: George Russell, Robert Kubica
Williams is one of the teams having a total clear-out on the driver front, and Tuesday is their first opportunity to try its all-new line-up for 2019. F2 champion George Russell takes the car in the morning with Robert Kubica taking over after lunch. They'll both be back again on Wednesday, too.
Renault: Nico Hulkenberg
Showing no lasting ill-effects from his roll at the start of Sunday's race, Nico Hulkenberg will be testing for Renault on Tuesday. With his 2019 team mate Daniel Ricciardo contractually unable to take part, Wednesday's test will be handled by the team's development driver Artem Markelov.
Toro Rosso: Sean Gelael
The team finally confirmed Alexander Albon in their 2019 line-up, but the British-Thai driver won't be in action for them this week. Instead, Tuesday's test will be the responsibility of F2 Indonesian driver Sean Gelael, with Daniil Kvyat returning to the team on Wednesday.
Haas: Pietro Fittipaldi
The Haas team has given its regular drivers the week off and is giving an opportunity to its two young test and development drivers instead. Pietro Fittipaldi makes his test debut with the team on Tuesday, with F2 driver Louis Deletraz on deck for Wednesday's session.
McLaren: Lando Norris
Lando Norris is no stranger to the McLaren cockpit, having served as the team's test and development driver for the past year. But Tuesday will be the first time at the wheel as their official full-time Formula 1 driver, with his 2019 team mate Carlos Sainz getting his chance on Wednesday.
Sauber: Kimi Raikkonen
Its' a case of deja vu all over again for veteran Formula 1 star Kimi Raikkonen, who returns to the team where he began his F1 career in 2001. Tuesday will be his first outing in a Sauber in 17 years, and on Wednesday it will be the turn of his new team mate Antonio Giovinazzi.