Fairuz replaced Heikki Kovalainen in the first free practice session at the 2010 Malaysian Grand Prix, as Jarno Trulli won a coin toss against Kovalainen. He drove a total of nineteen laps during the session, setting the 22nd fastest time, beating the Hispania Racing cars of Karun Chandhok and Bruno Senna. He also took part in the first practice session at the British Grand Prix, replacing Jarno Trulli, where he set the 23rd fastest time (1:39.510) ahead of the Hispania Racing car of Sakon Yamamoto. He replaced Heikki Kovalainen for the first free practice session of the German Grand Prix and the Abu Dhabi Grand Prix. At the end of the 2010 season, Fairuz parted company with Lotus Racing after one year of his five-year contract.