Victorian Opposition Leader Jess Wilson has frustrated journalists after cutting short a four-minute-and-thirty-nine-second press conference.

Ms Wilson convened journalists for a photo opportunity and press conference at 10.15am on Thursday.

After taking her first question more than 50 minutes later, at 11.05am, Ms Wilson walked off after less than five minutes and just a few questions.

The press conference was held after Labor released a document claiming Coalition policies had been underfunded by more than $6 billion.

Ms Wilson was repeatedly asked about whether she had costed all of her policies, but declined to say if or when she would release costed policies.

“I will be not lectured by the Labor government on costings where they have racked up $200 billion worth of debt,” Ms Wilson said.

“We saw the Victorian economic and financial update released on a Friday afternoon last week and it was missing key metrics, including the cash deficit.

“So we need to see the pre-election budget update. Our costings are dependent on that being released and that’s on the Labor government.

“Thank you very much.”

Ms Wilson then abruptly walked away, leaving frustrated journalists without answers to their questions.

The incident comes ahead of the News24 and Herald Sun People’s Forum to be held on Tuesday, November 17 at 7.30pm AEDT.

Victorian Premier Ben Carroll, Opposition Leader Jess Wilson, Victorian Greens Leader Ellen Sandell and Victorian One Nation Leader Warren Pickering will all attend.

The 90-minute forum will provide independently selected undecided voters with the opportunity to put questions directly to the four leaders.

Ms Wilson has been leading Mr Carroll as preferred premier, with the Coalition opening a 10-point lead over Labor ahead of the November state election.

The latest Newspoll, conducted by Pyxis Polling & Insights for The Australian, puts the Coalition ahead 55-45 on a two-party-preferred basis, up from 52-48 in July. 

Labor’s primary vote has fallen four points to 24 per cent, while the Coalition has risen three points to 33 per cent.  

One Nation has edged up to 20 per cent and the Greens to 14 per cent.