UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0.1 Safari/605.1.15

Steps to reproduce the problem:
<input type="text" class="test">

[class="TeXt" i] {
  background: red;
}

What is the expected behavior?
input should have a red background.

What went wrong?
selector ignore the "i" identifier when attribute name is class.

https://www.w3.org/TR/selectors-4/#attribute-case

Did this work before? No 

Chrome version: <Copy from: 'about:version'>  Channel: stable
OS Version: OS X 10.14.1
Flash Version: