testing/web-platform/tests/html-longdesc/invalid-longdesc-manual.html


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<!DOCTYPE html>
<html>
 <head>
  <title>Longdesc test: invalid longdesc</title>
 </head>
 <body>
  <img src="picture.png" alt="the image" longdesc="This is not a valid longdesc so this document should fail validation">
 </body>
</html>