The Spaniard De Villota will test for the team during the young driver test in Abu Dhabi later this year.
"I am very happy to be joining the Marussia F1 Team test driver programme," she said. This is a fantastic opportunity to work closely with a Formula 1 team and gain important experience to help me progress my career, including the chance to drive the new car later in the year at the Abu Dhabi test.
"I will be joining the team trackside so I'm looking forward to working alongside them at the first race next weekend and this can only help my future ambition to step up to Formula 1 racing."
Marussia F1 Team boss John Booth added: "We are pleased to welcome Maria to our test driver programme, which will enable her to be integrated into a Formula 1 team environment and gain a vast amount of experience that will be useful to her career progression.
"We will also provide Maria with the opportunity to sample F1 machinery later in the year, further adding to her racing credentials."
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