[lang="es"], lang="ES"

Ignore this test. (lang= with lang attribute is not supported)
You can only get meaningful results for this test if the lang= selector works with the lang attribute, since it checks a detail with regard to that support.

Test passes if you see green below.

Text

Assertion: A lang= value will match a lang attribute value regardless of case differences.

Next test
HTML5

selectors-035
Result summary & related tests