French secretary of state for sport Thierry Braillard has promised that widespread strike action over labour law reforms will not ruin Euro 2016 for visiting fans.
On Thursday, riot police were deployed in Paris and other cities around France as some protests were marred by violence.
Industrial action at oil refineries has led to fuel shortages and many petrol stations have been closed, while flight schedules and train services have also been disrupted.
The main rail workers' union has called for unlimited strike action starting on June 2, and the third largest in Paris upped the stakes further on Thursday by advising workers to begin downing tools on the opening day of Euro 2016 on June 10.
Meanwhile, a ninth national day of demonstrations is planned for June 14.
Braillard has insisted that the government will ensure that travelling supporters will be put in the best conditions possible during Euro 2016.
"Everything is being done to welcome everyone who wants to come and experience the Euros, which is all the same the third biggest competition in the world," Braillard told RMC. "Millions of visitors are going to come.
"If there are strikes, we'll make sure to avoid too much inconvenience for the people who will be there."
Braillard said that the government would not be blackmailed by unions and that while the right to protest and to strike is constitutional, it was important to give a good image of the country next month.
Unions have been angered that changes were controversially pushed through parliament earlier this month without a vote.
The reforms seek to relax employment laws in order to make it easier for companies to make decisions about hiring, redundancies, pay and holidays depending on economic conditions.