It turns out some issues with TN Ready testing were the vendor's fault, not an apparent cyber attack as originally thought.

State education leaders says the "substandard performance issues" will now cost the company that supplies the test $2.5 million.

The Tennessee Department of Education is cutting the funds from its invoice to Questar.

One of those issues first appeared to be a cyber attack but now officials say they can be traced to an authorized change by Questar.

The company maintains no student information was breached and they are still investigating.

READ MORE | TNReady technical issues plague Hamilton Co. schools Monday

But state education leaders are already changing the way students will be tested in the future.

"We're going to put out a new RFP in the Fall which will lead us to a vendor in the '19-'20 school year and going forward that will have technical expertise to do the work that we're asking in the online environment," Tennessee Education Commissioner Candice McQueen said.

The state will be working with Questar for TN Ready testing in the 2018-2019 school year.

The department will be looking into other vendor options for the following year.