CANBERRA, April 19 - Students in 1-in-10 schools in the ACT, Queensland, South Australia, Victoria and Western Australia were supposed to do their NAPLAN tests in May online.
But Queensland pulled out a fortnight ago, citing concerns about technological glitches and that students wouldn't be properly tested.
South Australia followed suit, and the other three jurisdictions announced on Wednesday they would also pull out.
ACARA, the body in charge of the tests, is disappointed the first part of the transition to online testing now won't happen this year.
"I respect the decision of states and territories to delay transition to allow more time to gain a greater level of confidence for the move online," ACARA chief Robert Randall said in a statement on Wednesday.
WA Education Minister Sue Ellery said tests of the new system over the school holidays had thrown up several issues that could hinder students completing tests
She was no longer prepared to let her state's students do NAPLAN online until the problems were fixed.
"My primary concern is to ensure students are able to demonstrate their literacy and numeracy skills without experiencing IT issues," she said.
ACT minister Gordon Ramsay said while students and teachers were ready to make the change, the technology was not.
"We won't roll out NAPLAN online testing until we have confidence that the system is also ready," he said.
All Year 3, 5, 7 and 9 students across the country are expected to do their NAPLAN tests online from 2019.
The move away from pen and paper tests will let ACARA mark tests quicker, meaning teachers get better information sooner about how their students are doing.