This is a test of commonsense. Complete the next sentence:

How to leave a tip in paris
Check for " service compris " on the bill.
This indicates that a service charge has already been included in the bill. Many dining establishments will include a 15% service charge, which is split between the staff.
Since french law requires that servers are paid a living wage, tipping beyond an included service charge is not necessarily expected. However, adding a bit more gratuity is more common in paris.