National Party MP Judith Collins has shared a story from a website known for its 'fake news', calling on the Prime Minister to "denounce" the claims made in the story.
The story alleges France has voted against having an age of consent, "becoming the latest nation to give in to pressure from an international network of liberal activists determined to normalise pedophilia and decriminalise sex with children across the world."
"Is @jacindaardern willing to denounce this legislation of child sexual abuse?" Ms Collins tweeted.
The site is the frequent subject of fake-news-busting stories, including a list of fake news sites identified by CBS.
Other stories currently on the 'Your News Wire' site include 'Hundreds Of Scientists Debunk Darwin's Theory Of Evolution' and 'FBI Admits 'Aliens From Other Dimensions' Have Visited Earth'.
In fact, France has strengthened its consent laws, rather than weakening them.
Sex between an adult and a minor under 15 is illegal, but under current French law, a minor is capable of consenting to sex. Prosecutors must currently prove sex was forced in order to classify it as rape.
The new law will make it easier for adult sex with an underage child under 15 to be classified as rape, if a judge says it stemmed from "abuse of the vulnerable". Advocates for women and children say the new law still doesn't go far enough.
The law passed with 92 votes in favour and none against. Left-wing politicians abstained from the vote, saying it didn't go far enough.
The law also allows spot fines for street harassment.
Journalist Matt Nippert tweeted Ms Collins, saying, "The site Judith is retweeting is described by Snopes as a 'notorious fake news-generating web site' and is famous for such stories as: 'Katy Perry: 'Human Flesh Is The Best Meat; Cannibalism Got A Bad Rap'."
"Then she [Ardern] won't have any trouble denouncing it - will she?" Ms Collins responded.