The Registrar of the Board, Is-haq Oloyede, who disclosed this in a statement on Saturday, also apologised to candidates for the sudden changes.
He said: “We could not go on with the Mock Examination and hereby announce extension of registration exercise of the 2017 UTME.
“This is because the appropriate rehearsal and test-running of the new system has been substantially achieved.
“The plan was to trial-test the readiness of our facilities and address the challenges that may likely confront the main examination.
“At this moment, we have realized that the plan to hold this Mock Examination was good for us. We are now in a better position to achieve better than we would have done without this trial testing. This is why the exercise is at no cost to the candidates.
“It is our strong conviction that this exercise is an experience for us. Our systems analysis has revealed interesting findings that will engender a seamless and successful 2017 UTME exercise.”
JAMB’s spokesperson, Fabian Benjamin, who confirmed the statement said the Board had on Friday said it would make changes on the exam process if need be.