Fatal error: Uncaught Error: Class "OpenApi\Tests\OpenApiTestCase" not found in C:\xampp\htdocs\swagger\vendor\zircote\swagger-php\tests\Processors\CleanUnmergedTest.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\swagger\vendor\zircote\swagger-php\tests\Processors\CleanUnmergedTest.php on line 17