Some students doing NAPLAN tests on MacBook Pro devices had access to spellcheck and auto-complete functions, including during the writing test.

In a number of cases during this year's tests, students were able to use the functions, according to multiple parents who have contacted the Herald since NAPLAN took place earlier this month.

Some students doing NAPLAN tests on MacBook Pro devices had access to spell check and other tools. Credit:AFR

It is understood many schools have reported the issue to testing authorities but others that had students experiencing the same advantage have not.

Spelling, punctuation and grammar are three of 10 key criteria used to mark NAPLAN writing tests.