Get PHPUnit autocomplete in IntelliJ IDEA

I'm trying to get IntelliJ IDEA to index PHPUnit.phar for autocomplete. I added the parent directory to my include path and IDEA shows it in the project sidebar, but the autocomplete is not saved.

I ended up extracting the .phar in the same directory and it worked fine. Also, I cannot "view" the .phar files the same way I could in PHPStorm.

Any ideas make me dislike storing the extracted .phar files?