Facebook is testing a new feature that marks fake news stories by sites such as The Onion with a "satirical" label, so users can distinguish them from real news stories.

A Facebook representative told BuzzFeed: "We are running a small test which shows the text ['Satire'] in front of links to satirical articles in the related articles unit in News Feed. This is because we received feedback that people wanted a clearer way to distinguish satirical articles from others in these units."