"It will be great to get back behind the wheel of the Caterham Racing GP2 car," said Rossi, who is also a Caterham F1 Team test driver. "Having raced at Barcelona just over a week ago in the final round of World Series by Renault, I'm very familiar with the circuit. I have experience with both Caterham Racing and the GP2 car from my outings with Caterham last year and look forward to working closely with the whole team again at the forthcoming tests."
Rossi wil be joined at Barcelona by Lucas Foresti, another graduate of the Formula Renault 3.5 Series.
"It will be great to work with the Caterham Racing team in Barcelona and I'm excited about trying out a GP2 car for the first time at a track I already know well," said the 20-year-old Brazilian driver, who was the F3 Brazil Open champion in 2011 and who has competed in two Macau Grand Prix events and spent 2010 in GP3 with Carlin.
"I've seen how much progress Caterham Racing has made in its first two years and am looking forward to working with a team that has already won in Monaco, Barcelona and Singapore," Foresti added. "I'm sure I'll learn a lot from my time on track and I'll do my best to help the team get through what is definitely going to be a busy program."
"We are also looking forward to working with Lucas in his first GP2 test and hope we have a successful couple of days in Barcelona," said Caterham Racing team manager Phill Spencer. "We are all looking forward to the test next week and are delighted to have Alexander back with us."
Britain's Auto GP champion Adrian Quaife-Hobbs has also been confirmed as running at Barcelona next week with Barwa Addax, before he moves down the pit lane to run with Arden for the second two-day session at Jerez.
"My plan for 2013 was to make a step up to GP2, and so I was pretty amazed when I realized the amount of interest that my Auto GP title win had generated in the GP2 paddock," said Quaife-Hobbs. "I really got a lot of contacts and to me that meant a lot: it's good to have different options when you must choose how your career will progress."
Arden announced on Twitter on Friday that their drivers for Barcelona would be their regular 2012 Swiss driver Simon Trummer alongside New Zealander Mitch Evans, who clinched the GP3 championship last month at Monza with Arden's sister GP3 squad.
Other teams still to unveil their driver selections for next week's test at Catalunya are Lotus GP, Trident Racing, Venezuela GP Lazarus and Carlin.
But surely the most sough-after race seat in 2013 will be at DAMS, after the team propelled Romain Grosjean to the 2011 GP2 title and followed that up by backing Davide Valsecchi to this season's championship over Arden's Luiz Razia.
Scuderia Coloni are also expected to participate in the session after all, despite having decided to exit the series after the 2012 season. They will field two of their 2012 driver, Daniël de Jong and Luca Filippi.