Should Prime Minister Michel Barnier's administration be ousted, it will be first time France has witnessed such an event in more than 60 years.
The toppling of the Barnier government after just three months in office would present President Emmanuel Macron with the unenviable choice of picking a viable successor.
France's National Assembly is due to debate two no-confidence motions brought by the hard-left and far-right in a standoff with Barnier after he forced through a controversial social security financing bill without a vote.
For Barnier to survive, the far-right opposition leader Marine Le Pen and her National Rally deputies would have to abstain in today’s vote on a motion of no-confidence tabled by leftwing parties.