Davide Valsecchi will be the first of Lotus' test drivers to appear in Friday morning practice sessions this year.
Karun Chandhok had been mentioned as a contender but was not named by the Tony Fernandes-led team.
A statement said Razia and Valsecchi "will be taking part in a number of Friday practice sessions at selected 2011 grands prix".
Autosprint in Italy said it will be Valsecchi, 24, who will take over one of the T128 cockpits in Friday morning practice for Australia and Malaysia.
"This is a great opportunity for me," he said.
"Melbourne will be difficult for someone who has not even seen that track, but Sepang is a good opportunity," added Valsecci, referencing Robert Kubica and Sebastian Vettel as two examples of drivers who built F1 careers based on Friday driving.