Villeroy, who is also governor of the Bank of France, said there was no urgency to decide on the future of the Pandemic Emergency Purchase Programme at the ECB's September meeting because unlike the US Federal Reserve
The experiment will focus on the bank-to-bank 'wholesale' lending market rather than everyday public transactions but will be the first time a digital euro and Swiss franc have been fully tested.
The eurozone is adapting to a "strong trend" towards the digitalisation of payments," said Bank of France Deputy Governor Sylvie Goulard.
President Emmanuel Macron on Wednesday ordered France into its third national lockdown and said schools would close for three weeks as he sought to push back a third wave of COVID-19 infections that threatens to overwhelm hospitals.
The French central bank said last month that the euro zone's second-biggest economy was set to grow 5.5% this year.
Already from this year it said it would turn its back on companies that derive 10% of their revenues from shale oil or gas, tar sands or exploration in the Arctic or deep water.