The Transport Agency expects the pass rate for the learner driver theory test to fall as a result of changes to the testing.
The paper scratch test is being replaced with a computerised version, which has been used in the Wellington region since August and is being rolled out in Auckland this week.
Transport Agency spokesperson Andy Knackstedt says the random nature of computer testing will likely mean the 70% pass rate achieved under the scratch test system won't be reached.
Mr Knackstedt says people will have to know the road code thoroughly to pass.
The new technology is expected to be in place nationwide by the end of the year.