We got our first glimpse of all 10 of the new F1 cars when pre-season testing got under way at the Bahrain International Circuit yesterday, and they were back out on track on Saturday for Day 2.
After a shocking start for World Champions Mercedes yesterday when gearbox issues limited their running, Lewis Hamilton was out on Saturday morning and was racking up a good amount of laps as the team look to get their programme back on track after they missed almost all of Friday morning's session. But his progress was halted midway through the morning when he went off at Turn 13 and got his W12 beached in the gravel, triggering a red flag.
Elsewhere Fernando Alonso got his first laps in the new Alpine A521 after his team mate Esteban Ocon handled driving duties on the first day.
Daniel Ricciardo was also in action again and was looking quick in McLaren's new Mercedes-powered MCL25M - as he had on Friday morning, when he topped the time sheets.
But it wasn't all plain sailing - there were spins for Carlos Sainz in the Ferrari, and Nicholas Latifi in the Williams, the latter getting his first running of the three day test after reserve driver Roy Nissany was in the car all day on Friday.
Check out the gallery above for the best pics from testing, which we'll be updating throughout the day.