Slovakia has taken the European Union to court over its mandatory mechanism to relocate some 120,000 asylum seekers across the bloc.

The lawsuit was filed at the European Court of Justice in Luxembourg on Wednesday, Slovakia’s Prime Minister Robert Fico told reporters.

At issue is the plan approved in September by interior ministers to relocate refugees across 26 of the 28 member countries. The U.K. and Denmark are not participating because of special provisions in EU treaties.

Slovakia, Hungary, Romania and the Czech Republic opposed the plan, but were outvoted under the qualified majority rule, which was applied for the first time on such a divisive migration issue.

Fico said he wanted the court to rule the mandatory quotas were invalid, saying they were “nonsensical and technically impossible.”

Under the relocation mechanism, “people in clear need of international protection” get airlifted from the main entry points in Italy and Greece to other EU countries. That criteria currently applies only to refugees from Syria, Iraq and Eritrea.

Slovakia is required to take up 802 people under the plan. However, there have been few flights so far.

Germany and France were the main advocates for the mechanism, hoping it would relieve some of the pressure from the influx of migrants arriving in Greece and Italy. Most continue north to Germany, which expects around one million migrants by year-end.

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A Commission spokesperson said Slovakia has the prerogative to challenge the decision in court but must comply with the law while the court deliberates.

Diplomats of different member countries told POLITICO they don’t expect the court to rule in Slovakia’s favor, but rather see it as a tactic to put pressure on the European Commission.

Hungary’s parliament approved a bill two weeks ago that will allow Prime Minister Viktor Orbán to challenge the refugee relocation mechanism in court, which he is expected to do this month, according to Hungary Today.

Around 890,000 migrants and refugees have reached Europe so far by sea this year, according to the UNCHR, the United Nations’ refugee agency.