在include path phpstorm中找不到PHPUnit

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 5.4 (traits, short array syntax, etc.) and interpreter is Name(5.4.7) where Name is user defined.

The error appears when I try to run the code and the exact message is this:

C:\xampp2\php\php.exe C:\Users\DELL\AppData\Local\Temp\ide-phpunit.php --no-configuration

C:\xampp2\htdocs\ft-website

Testing started at 2:34 PM ...

Process finished with exit code 1

Cannot find PHPUnit in include path (.;C:\xampp2\php\PEAR)`