MADISON, Wis. (AP) — Democratic Gov. Tony Evers vetoed a Republican-authored bill Friday that would have required state education officials to score standardized student tests according to the scale they used years ago.

State schools Superintendent Jill Underly, a liberal who faces conservative Brittany Kinser in Tuesday’s spring election, changed student standardized testing benchmarks and scoring thresholds for school district performance report cards last year. She has said that she made the performance changes at the request of Wisconsin teachers and how they felt their students can perform.

Republicans argue the changes watered down standards in an effort to artificially inflate performance grades and made it harder to compare Wisconsin students and districts to their peers around the rest of the country. Evers has said Underly made a mistake because she didn’t cerate a public dialogue about the changes before she imposed them, but online legislative records indicate he vetoed the bill on Friday morning.

The governor said in his veto message that while he’s been critical of the process, he objects to legislators trying to undermine the state superintendent’s authority and independence.