Romain Grosjean insists he is not upset about not getting his hands on Lotus' new 'super DRS' system.
Last week at Hockenheim, only Kimi Raikkonen's black and gold E20 was fitted with the top speed-boosting prototype in practice.
And the system will return to Raikkonen's car for more testing this weekend in Hungary.
"We are definitely trying it again here," Frenchman Grosjean said in Hungary when asked about the Mercedes-like system.
"Kimi will have it on his car, not me," he clarified, according to Auto Motor und Sport.
"We have only one version and setting it up is not so easy," said Grosjean.
Grosjean insisted he is not upset that Raikkonen is the only Lotus driver to enjoy the system so far.
"I was the first to get the last update," said the 26-year-old, "and now it's Kimi's turn. This is perfectly normal."
He hopes it will be ready to race soon.
"It would be a big help on tracks with longer straights, like Spa and Monza," said Grosjean.