Polish Prime Minister Beata Szydlo slammed French President Emmanuel Macron’s comments about Poland becoming isolated in the EU and going against the interests of the bloc on August 25.

Macron spoke in the Bulgarian town of Varna during his tour of Central and Eastern Europe that notably omitted Poland. Warsaw has been at odds with the EU on a number of issues since the populist rightwing government of Law and Justice (PiS) took over in late 2015.

“Poland today is not a country that can show Europe the way, it's a country that has decided to go against European interests in many areas,” Macron told a press conference in Varna, also on August 25.

Once a poster child of the enlargement that included Poland and seven other post-communist nations in the EU, Poland is currently struggling to make an impact on the bloc’s politics.

Warsaw is under a probe from the European Commission over adherence to the rule of law, while facing charges in the Court of Justice of the EU over logging in Bialowieza Forest, a nature reserve protected under EU law.

Warsaw also opposes the commission’s scheme of distributing migrants across member states to ease pressure on  frontier countries such as Italy or Greece. Poland says the Western European countries that allowed migration are now unsafe as migrants hike the risk of terrorism.

In a brazen response, Szydlo told Macron Poland’s position in the EU is as strong as ever.

“Poland is not in conflict with any member states of the EU, nor with the EU itself,” Szydlo said in a statement.

“I advise the president to take care of the affairs of his own country. Perhaps then he will be able to achieve the same economic results and the same level of citizens’ security that is guaranteed in Poland,” the PM also said.

Szydlo also said Macron was “arrogant,” which might be due to his “lack of political experience and practice”.

Macron’s criticism also came in the context of a heated disputed between France and Poland over so-called “posted workers”.

Under the posted workers directive, firms in a EU country can reassign their employees to provide services in another EU country. While the directive says posted workers are subject to labour laws in the country where they operate, social security contributions are paid in the country of origin and there are loopholes enabling employers to offer lower compensation to employers, thus gaining a competitive advantage over other firms in the respective countries where they are assigned.

Logistics companies from CEE have especially gained from offering cheaper services in the Western part of the bloc.

Macron toured Austria, Romania and Bulgaria last week with the posted workers topic high on his agenda. He had earlier won support for changes in the posted workers directive from the Czech and Slovak prime ministers Bohuslav Sobotka and Robert Fico. However, the Romanian leader Klaus Iohannis and the Bulgarian PM Boyko Borissov were less keen to give Macron backing.