Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in I:\www\pvcDi\vendor\pvc\regex\tests\php_variable_name\RegexPhpVariableNameTest.php:12 Stack trace: #0 {main} thrown in I:\www\pvcDi\vendor\pvc\regex\tests\php_variable_name\RegexPhpVariableNameTest.php on line 12