This tests that if both aria-labeledby and aria-labelledby are used (for reasons best known to the page author), then aria-labelledby is preferred.

Delta Eta Eta Using aria-labelledby Using aria-labeledby
usingLabelledby.name: [Using aria-labelledby]
usingLabeledby.name: [Using aria-labeledby]
usingLabeledbyAndLabelledby.name: [Using aria-labelledby]