And that, folks, is that. What a journey it has been. I can't tell you how much of a pleasure it has been guiding you through this marvellous sport. Thanks so much for your company. That's me done. Until next time, it's good afternoon from me. Over and out.

The second test takes place in Barcelona and kicks off on 19 February. That'll last four days. And there won't be long to wait for the next and final one because that begins on 26 February and will also be hosted by Barcelona's Circuit de Catalunya.

The season itself begins on 13 March with Friday practice for the Australian Grand Prix and after 18 more races, it ends in Abu Dhabi for the season final in November. It's going to be awesome.

Here's a snapshot of the day's headlines:

• Kimi Raikkonen sets the fastest last of the four-day test

• Lewis Hamilton completes 117 laps, but his spin brings out the red flag

• McLaren and Jenson Button set their quickest lap of the week and clock 35 laps but day disrupted by a "trivial issue" with the oil levels and fuel pump problem

• Red Bull miss much of the morning with an ERS issue but recover in the afternoon with Daniil Kvyat managing 64 laps

• Marussia's hopes of competing in 2015 are boosted

• Force India say they will make the season opener despite delays with their new car

Image source, EPA

That benchmark lap from Ferrari's Kimi Raikkonen is the fastest of the four days. It's been a good week for Ferrari, but it's unwise to read too much into headline times.

1) Kimi Raikkonen (Ferrari) 1:20.841 105 laps

2) Marcus Ericsson (Sauber) 1:22.019 +1.178 112 laps

3) Lewis Hamilton (Mercedes) 1:22.172 +1.331 117 laps

4) Max Verstappen (Toro Rosso) 1:22.553 +1.712 97 laps

5) Felipe Massa (Williams) 1:23.116 +2.275 73 laps

6) Romain Grosjean (Lotus) 1:23.802 +2.961 53 laps

7) Daniil Kvyat (Red Bull) 1:23.975 +3.134 64 laps

8) Jenson Button (McLaren) 1:27.660 +6.819 35 laps

Image source, Getty Images

Kimi Raikkonen finishes fastest on the final day of the first pre-season test in Jerez.

Williams:, external @MassaFelipe19 has finished his check list and so finishes his day.

Mercedes:, external RADIO @LewisHamilton: "Before the flag I just want to say well done guys. Great first week back!"

Sauber:, external #ME9 made a check of the fuel system and ran out of fuel, as a result.

Sauber's Marcus Ericsson has stopped on track. That could bring an abrupt end to the session and indeed this test.

Red flag again!

Sauber's Marcus Ericsson is the first one back out...

Just a short stoppage as a marshal dashes onto the circuit, retrieves a piece of debris and then hops back over the barriers. Good work.

We have a red flag!

F1 journalist Dan Knutson in Jerez: "The teams are starting to pack up. While the cars will go back to the factories, the garage equipment will be trucked to Barcelona for the second test."

Image source, Getty Images

Lewis Hamilton continues to clock up the laps, with Kimi Raikkonen and Daniil Kvyat for company.

Ferrari will more than likely reflect on this test as a job well done. Last year was poor by their standards as they failed to win a single race. This year, things are looking up. Sebastian Vettel was fastest on both the first two days and Kimi Raikkonen was second quickest yesterday and looks set to top the times today.

Image source, Getty Images

Just 40 minutes of this test remaining with Toro Rosso's Max Verstappen heading out to make the most of it.

Marcus Ericsson pumps in a good lap to go third quickest. Can he improve further to ensure Sauber finish in the top two on all four days of this test in Jerez?

Nico Rosberg admits his sadness at the possibility of the German Grand Prix being dropped from the calendar. Read about that and other stories in today's F1 gossip column.