France warned Iran on Tuesday against carrying out any further measures that could hinder its 2015 nuclear deal with world powers, but appeared to hold off on confronting Tehran over its decision to exceed its low enriched uranium (LEU) limits, Reuters reports.

France, along with Britain and Germany, is seeking to save the deal since U.S. President Donald Trump quit the accord last year and imposed punishing sanctions on Iran.

President Emmanuel Macron recalled “his attachment to the full respect of the 2015 nuclear accord and asks Iran to reverse without delay this excess, as well as to avoid all extra measures that would put into question its nuclear commitments,” the French presidency said in a statement.

The move is a test of European diplomacy after French, British and German officials had promised a strong diplomatic response if Iran fundamentally breached the deal.

The Europeans, who opposed Trump’s decision to abandon the agreement, had pleaded with Iran to keep within its parameters.

The French presidency statement said that Macron would take steps in coming days to ensure Iran met its obligations and continued to benefit from the economic advantages of the deal.