Narcissa laid out: "We believe that our current testers from the OWLs and NEWTs department have been tempering with the tests nearly every year. We first have had some suspicions, but when Lucius checked up with the wards of Hogwarts, he had seen that there were unfair and biased markings on the OWLs and NEWTs. The problem is that Hogwarts can’t change the mark, because the OWLs and NEWTs have their own magic, where the wards couldn’t interfere like with the school assignments and tests, but the wards could put a red mark that an OWL or NEWT was unfairly graded. Here is the list that the magic had registered."