The 2007 world champion, who is returning to F1 this season after two years contesting the World Rally Championship, will drive the former Renault team's R30 chassis on January 23-24.
It had been anticipated that Raikkonen, who has not driven an F1 car since he raced for Ferrari at the 2009 Abu Dhabi Grand Prix, would be given more time to acclimatise and his new team confirmed as much on Monday via Twitter.
Speaking in December after his comeback was announced, Raikkonen said he did not anticipate any problems in making a return to the cockpit.
"Comparing 2009 to next year the biggest difference will probably be the tyres. I don't think there is a lot of difference with the cars. DRS is a new thing but this is basically similar to before," said the Finn, who had his seat fitting at Lotus's factory last week.
"The button that used to be for the front wing has disappeared, so now it's for the rear wing. I would guess the main difference is really the tyres."
The first official pre-season test of 2012 cars begins at Jerez on February 7.