Testing document title: multiple title elements

There are two <title> elements in <head> on this page, invalid HTML, only one is permitted. Per the HTML spec, the first <title> encountered is used and later ones are ignored, but that's a spec statement, not a guarantee about every browser or AT implementation.

Expected result: the browser tab should show the first title's text, "Testing document title: multiple title elements", not the second. Assistive technology should announce the same first title on page load, worth confirming directly rather than assuming every combination follows the spec exactly.

HTML markup

<head>
  <title>Testing document title: multiple title elements</title>
  <title>Second title element (should be ignored)</title>
</head>