Jaguar offered Pizzonia the chance to stay on as test driver but he turned it down.
Vettel has been released from his role as a test driver for BMW Sauber.
He has become both the company's de facto chief marketing officer and chief test driver.
WSJ: Toyota Chief Akio Toyoda Grabs Wheel to Turn Around Humbled Auto Giant
D'Ambrosio has spent four seasons in the GP2 feeder series and is a reserve and test driver at Renault.
BBC: Jerome D'Ambrosio & Esteban Gutierrez win F1 test roles
The Ulsterman has also won in GP2, British Formula 3, British Formula Ford and was a test driver for BAR-Honda.
German Nick Heidfeld and Britain's Anthony Davidson, who impressed as BAR's test driver last season, are also in the running.
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In 2007 he was test driver for Honda and was then BMW's reserve driver until they quit the sport last year.
Force India test driver Vitantonio Liuzzi said the tires were "amazing", providing excellent grip compared to the grooved tires currently used.
Last year's winner, Sweden's Bjorn Wirdheim, is now the Jaguar test driver.
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Klien, 27, has raced in F1 for both Jaguar and Red Bull and has been a test driver for Honda and BMW Sauber.
Klien, 23, is a test driver for Honda but the team have given him permission to drive for Spyker in Spa on Thursday.
BBC: SPORT | Motorsport | Formula One | Spyker hand Klien testing drive
McLaren test driver Pedro de la Rosa set the fastest time on Wednesday, nearly a second quicker than Williams test driver Marc Gene.
BBC: Pedro de la Rosa in the McLaren MP4-19B at Jerez in Spain
Minardi were not given the chance to put their spare car into action as test driver Bas Leinders was not given permission to compete.
The Dutch team are also considering promoting test driver Markus Winkelhock and have been linked with Indian Narain Karthikeyan, who currently test drives for Williams.
BBC: SPORT | Motorsport | Formula One | Spyker hand Klien testing drive
Bernoldi is backed by Austrian energy drink company Red Bull, which first sponsored him as a Sauber test driver and then in his move to Arrows.
We also featured Malaysian teenager Nabil Jeffri, who became the youngest ever Formula One test driver recently when he conducted an aerodynamics test for Lotus Racing.
BAR's Takuma Sato was fourth with a 1:18.540 lap, followed by Toyota test driver Ricardo Zonta, BAR tester Anthony Davidson and Williams' other test driver Antonio Pizzonia.
BBC: Pedro de la Rosa in the McLaren MP4-19B at Jerez in Spain
Alonso made his F1 debut for Minardi in 2001, moved to Renault as their test driver in 2002 and was promoted to their race team in 2003.
Earl had been a test driver for Chrysler and was a foreman at the engineering garage, the kind of man who worked for one company his entire career.
Meanwhile, Marussia test driver Maria de Villota has left hospital in her native Spain and will return home to recover from the crash in Britain that cost her an eye.
Schumacher agreed a new role with Ferrari over the summer, cutting his links with the F1 team to become an ambassador, consultant and test driver for the company's road cars.
Test driver Luca Badoer stepped in for two races, but after failing to score a point he was thrown out of the seat to make way for Force India's Giancarlo Fisichella.
In order to train for her job as a test driver for the Formula One team Marussia, Maria de Villota puts on a weighted helmet and does a couple hundred head rolls.
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Former test driver De la Rosa would seem to be in pole position, having filled in for McLaren since Juan Pablo Montoya left the team mid-season to join the American Nascar circuit.
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McLaren test driver Gary Paffett was fifth fastest, but his team's official race entries for this year -- world champion Jenson Button and his predecessor Lewis Hamilton -- sat out the session.
"We are pleased to welcome Maria to our test driver program, which will enable her to be integrated into a Formula One team environment and gain a vast amount of experience that will be useful to her career progression, " he said.
Massa, who suffered serious head injuries in a qualifying crash at the Hungarian Grand Prix, is set to be sidelined for at least four races, with test driver Luca Badoer now drafted in for the next grand prix in Valencia next week.
Test driver Pedro de la Rosa will give the McLaren its debut in a private test at Portugal's Algarve circuit on Saturday - the first of a series of critical tests before the start of the new season in Melbourne, Australia on 29 March.
Mr. Toyoda's approach carries risks, not least of which is the possibility of the type of high-speed accident that killed Toyota's chief test car driver in 2010.
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Sauber have also enhanced their line-up by signing Mexican Esteban Gutierrez as their test and reserve driver for 2011.
BBC: Jerome D'Ambrosio & Esteban Gutierrez win F1 test roles
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