Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in D:\svn\bitfx\vendor\sebastian\diff\tests\Output\UnifiedDiffOutputBuilderTest.php:23 Stack trace: #0 {main} thrown in D:\svn\bitfx\vendor\sebastian\diff\tests\Output\UnifiedDiffOutputBuilderTest.php on line 23