More than 3000 students sitting an NCEA level one English exam were affected by a server error which stopped the digital assessment for ten minutes.
The error meant students weren't able to connect to the exam software.
Andrea Gray from the Qualifications Authority said the issue had been identified and fixed by the server provider.
There were 38 schools registered to take part in the pilot exam, and the NZQA have made contact with them to find out more about what happened.
The exam finish time was able to be extended to make up the lost time.