Google has made a practice of paying female employees less than their male counterparts, a Department of Labor official alleged in court testimony last week.

The agency found “systemic compensation disparities,” regional director Janette Wipper said at a hearing in San Francisco, according to reports.

The DoL confirmed the accuracy of the testimony to the E-Commerce Times.

The hearing was in connection with the department’s lawsuit over Google’s failure to hand over detailed compensation data about employees at its Mountain View, California, headquarters.

“Based on what Google has produced thus far and based upon the department’s investigation thus far, this investigation has revealed significant evidence of discrimination in pay against women at Google’s headquarters,” Department of Labor spokesperson Jose Carnevali told the E-Commerce Times.

Google has vehemently denied Whipper’s allegations, insisting that its own analyses show no gender pay gap, and that the Labor Department has not provided any data or shared the methodology underlying its findings.

Compliance Failure

As part of its equal opportunity compliance review, the Office of Federal Contract Compliance Programs in 2015 asked Google to provide compensation data and documents from its headquarters. Since Google is a federal contractor, it must comply with the review.

The DoL earlier this year filed suit against Google, asking the court to cancel all of Google’s federal contracts and bar the firm from all future contracts.