Germany's Auto Motor und Sport said the circuit is one of no fewer than three venues selected by F1 teams to complete their allowed days of 'young driver' running in 2012.
The magazine said the three-venue solution is a farcical outcome, after the scheduled end-of-season Abu Dhabi test plans disintegrated due to team disharmony.
The bulk of the teams are, however, sticking with Abu Dhabi, including Red Bull, McLaren, Lotus, Force India, Sauber, Toro Rosso and Caterham.
Williams, HRT and Marussia ran at Silverstone last week.
Auto Motor und Sport said the Magny Cours session will take place in the week after the Italian grand prix.
The report said midfield teams ruled out joining Ferrari and Mercedes in France because they have "neither the material nor the staff to complete a parallel program" just days before freight sets off for Singapore.