Cannot find PHPUnit in include path phpstorm

Question

Cannot find PHPUnit in include path is the error message I get when I try to run my code in phpstorm.

In the PHP Settings, my PHP level language is 5

Answer 1

For those that are looking at it in 2020, starting from PHPStorm 2019 this is under:

Languages and Frameworks->PHP->Test Frameworks

1. Choose to add a new library
2. Select "PHPUnit"
3. Select "Path to phpunit.phar" radio
4. You'll have an automatic option to download PHPUnit