SAT testing planned for Saturday has been cancelled in China and Macau, the Associated Press reports. The cancellation marks another episode in a series of Chinese plagiarism and cheating scandals.

Allegedly, some students have already seen copies of the test that was to be administered Saturday. To be safe, the test was cancelled by The College Board at 45 testing centers. The College Board would not explain how students may have seen the test in advance, out of fears future cheaters would try to get around the method test administrators used to discover the alleged cheating. “Canceling tests is the most serious step taken if cheating is suspected,” Stacy Caldwell, the College Board’s vice president for college readiness assessments, told the AP.