INDIANAPOLIS (AP) — The Indiana State Board of Education has put off a vote on setting the pass-fail levels for the ISTEP standardized exam because of questions over potential differences in difficulty between the test’s online and paper versions.

Board members had been expected to set the pass-fail levels on Wednesday, but decided to delay that decision after being told that a committee of educators didn’t have information on the test differences when it developed proposed passing marks earlier this month.

It isn’t clear when the pass-fail levels will be set. The decision further delays results from the test that more than 400,000 students took last spring.

The much-maligned ISTEP exam has faced controversy over long hours of testing time and widespread disruptions as thousands of students were kicked off their online exams.