Marussia's chief engineer Dave Greenwood believes the team is in good hands after watching Max Chilton and Luiz Razia in action at Jerez.
Chilton and Razia put in the laps at Jerez last week where they familiarised themselves with the team's new MR02.
The duo completed 107 and 113 laps respectively while their fastest times for the week were separated by just 0.043s in Razia's favour.
"Both Luiz and Max performed well in Jerez and delivered all we asked of them in their first test with the new car," said Greenwood.
"It wasn't an easy week for them by any means; we were getting over the car's initial teething problems, which made it difficult for them to get into a good rhythm.
"Nonetheless, they both applied themselves well, were fully focused on the engineering programme and their feedback was very complete.
"Jerez was a good foundation step and the next two weeks in Barcelona will test them further. We are confident that they will rise to the challenge."