A Frenchman, fired for wearing Bermuda shorts to work, argued in an appeal last week that his employers violated his freedom.
Cedric Monribot, 29, lost his job as a technician at electronics group Sagem in June for flouting orders to wear trousers to work.
Monribot had initially argued that the firing constituted sex discrimination. But an industrial tribunal rejected that claim in August. His lawyers changed their argument at a second appeals hearing to allege that Sagem had "violated a fundamental freedom of an employee." The court will rule on November 13.