While National's ruling out working with Opportunity because they're too left wing, Labour's urging would-be Opportunity voters to instead vote for Labour to keep National out.
It comes after Opportunity's deputy leader Daniel Eb told Kea Kids News he'd vote National if he couldn't vote Opportunity at this election. It's also understood Eb was a Young Nat when he was at high school in 2005.
"They're not occupying a lot of my thinking at the moment," said Labour leader Chris Hipkins, when asked about Eb's comments.
"It's something TOP voters need to think about. If they want to change the government, they need to vote Labour," he told Stuff.