inheritance from HTML encoding
Test passes if you see a green box.
Assertion: The user agent applies the encoding of the HTML file to a css stylesheet whose encoding is not otherwise declared.
The HTML page is served as ISO 8859-15. The CSS file has no encoding set nor BOM.
The letters shown are for debugging, should the test fail. Visible letters (left) show what was read from the CSS file; letters that appear when highlighted (right) show what they should match in the HTML.