<!DOCTYPE HTML> <html lang="en"> <head> <meta charset="utf-8"/> <title>CSS Test reference</title> <style> @font-face { font-family: Libertine; src: url(support/fonts/LinLibertine_Re-4.7.5.woff); } body { font-family: sans-serif; } div { margin: 1em; font: 32px Libertine; } .notref { font-feature-settings: "liga" 0; } </style> </head> <body> <p>Test passes if the "fi" below DOES form a ligature: <div class=notref>fi</div> </body> </html>