The Kansas Supreme Court signed off Friday on an increase in spending on public schools that the Democratic governor pushed through the Republican-controlled Legislature, but the justices refused to close the protracted education funding lawsuit that prompted their decision.

The new school finance law boosted funding roughly $90 million a year and was enacted in April with bipartisan support. The court ruled that the new money was enough to satisfy the Kansas Constitution but also said it was keeping the underlying lawsuit open to ensure that the state keeps its funding promises.

"The State has substantially complied with our mandate," the court said in its unsigned opinion, referencing a decision last year that the state wasn't spending enough.

Gov. Laura Kelly had hoped the Supreme Court would end the lawsuit, which was filed by four local school districts in 2010. The districts' attorneys argued the new law would not provide enough new money after the 2019-20 school year and wanted the court to order additional increases.

Kansas spends more than $4 billion a year on its public schools ? about $1 billion more than it did during the 2013-14 school year ? because of the court's decisions. Some Republican lawmakers, particularly conservatives, have complained that the court has infringed on lawmakers' power under the state constitution to make spending decisions.