"NZDL and the Transport Agency will investigate any concerns or disputes about the outcome of a test through an established complaints investigation process."
Mark Chapman, the general manager of the PassRite driving school - which was not involved in the incident - said learner drivers got frustrated from time to time, which is why it was crucial to have well-trained driving instructors who were suited to the job.
"A lot of it comes down to how the individual is handled at the time ... taking time and walking away and recognising there is an issue," he said.
"Being an instructor is a lot like being a school teacher and you've got to have the ability to not only teach people, but you've got to have the ability to coach and mentor."
Mr Chapman said while he supported the new, more difficult, driver licence tests, the cost of the tests was too high.
There were 15 reported incidents of verbal or physical abuse on driving test officers in the year to October 2013 and 16 others in 2012.
Costs adding up
• $96.10 for a learner's licence test
• $137 for a restricted licence test
• $111.70 a full licence test
If you need to re-sit the exam the cost is:
• $47.40 for learner's
• $88.30 for restricted licence
• $61.70 for full licence.