The Little Sisters of the Poor, the nursing home-operating group of nuns that made headlines for its battle against the Affordable Care Act’s contraception coverage mandate, is taking up the fight once again.

The nuns were originally part of a large lawsuit filed by multiple organizations claiming a moral objection to the provision of the ACA that required employers’ health plans to cover contraception. The mandate did allow certain groups, such as the nuns, to request waiver to be exempt from the policy. The Littie Sisters, however, argued that signing the waiver was still a violation of their religious freedom. The case was eventually heard by the Supreme Court, which sent it back to lower courts to reach a new settlement.

In October, President Donald Trump’s administration announced plans to roll back the contraception mandate and allow employers to opt out of the policy.

That plan was met with legal challenges from multiple states and other groups, in an attempt to preserve the mandate. The Little Sisters filed motions on Nov. 21 to join two of those suits, launched by California and Pennsylvania, on the side of the government to call for the rollback to continue.

Becket, the law firm that represents the nuns, said in a statement Tuesday that the group is “asking the court to ensure that they can continue their vital ministry of caring for the elderly poor without violating their faith.”