Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in C:\AppServ\www\greenhess-storage\vendor\guzzlehttp\streams\tests\NullStreamTest.php:6 Stack trace: #0 {main} thrown in C:\AppServ\www\greenhess-storage\vendor\guzzlehttp\streams\tests\NullStreamTest.php on line 6