Cricket fans risk on-the-spot fines for misbehaving at the Boxing Day Test match in Melbourne, while spectators making racist remarks will be thrown out, authorities have warned.

Cricket authorities are supporting a new Victoria Police system of issuing on-the-spot fines for unruly behaviour among fans attending the Australia-South Africa match at the MCG.

Superintendent Mick Williams said the fines would encourage responsible behaviour and create a safe and fun environment for all attendees.

Cricket Victoria spokesman Eivion Bowen said the fines were designed to promote enjoyment at the cricket for players and spectators.

"My understanding is the things that may be fined are throwing things and perhaps trying to re-enter the ground after being ejected," he said.

"There are already existing fines for things like trespassing onto the field, they are quite massive fines as it is."

He said details of the fines would be released on Thursday.

Meanwhile, the International Cricket Council on Wednesday warned their international anti-racism policy would be enforced at the Boxing Day test.

"Each of our members is committed to implementing this policy which deals firmly with the issue including the ejection of those responsible for this type of unacceptable behaviour," ICC Chief Executive Malcolm Speed said.

His comments follow reports of spectators making racist comments to South African players during the first test in Perth.

Cricket South Africa on Wednesday said it had been assured preventative measures and increased security would be in place at the Boxing Day test in Melbourne and third test in Sydney to avoid the incidents being repeated.

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