The Victorian Government will review myki fines after public complaints and criticism by the public transport ombudsman.

Ombudsman Treasure Jennings last month called for improvements to the way $75 on-the-spot penalties were offered to people caught without a valid ticket.

There were concerns some people were finding it difficult to make an informed decision on whether to pay the fine.

Public Transport Minister Jacinta Allan said the review would examine if the $75 penalty fare, introduced by the previous Liberal government, should be scrapped.

"This and a range of matters needs to be examined ... it's timely to do that and to do it from the perspective of making sure the system is equitable, effective and fair," she said.

Ms Allan said the enforcement of the myki system needed to be fair.

"The public transport ombudsman has raised a range of issues with the introduction of on-the-spot fares ... and it's appropriate those issues among others are looked at appropriately and that's the action that we're taking," she said.

The Opposition's public transport spokesman, David Hodgett, said Labor had botched myki from the start.

He said the $75 penalty was introduced as a trial.

"This review is because the ticketing system can't withstand legal scrutiny because you've got 40,000 fines being challenged by commuters in the court," Mr Hodgett said.

"It's yet again another reminder that Labor can't manage major projects, they've poured millions and millions of dollars into the myki system and here we go with another review of Labor's myki system."

High-profile human rights barrister Julian Burnside QC, who has represented many people who have challenged their fines in court, welcomed the review.

He said most of the cases he knew of had been dismissed.

"People who have not committed any offence, who've done what they can to touch on, find themselves getting a summons, they're told they've got to go to court and it will be a $223 fine," he told 774 ABC Melbourne.

"A lot of people think, 'hang on, it'll cost more than that just to take a day off work', and they pay up."

Mr Burnside said authorised public transport officers should use more discretion when dealing with people who have made an attempt to travel on a valid ticket.

"I have had lots and lots of people ... school kids and young women who are actually physically frightened because they're surrounded by four authorised officers who are sort of six foot three, that sort of tactic is just ridiculous."