Fatal error: Uncaught Error: Class "TestCase" not found in /home/kibrisotoilan/public_html/vendor/visiosoft/streams-platform/tests/Unit/Support/CollectionTest.php:3 Stack trace: #0 {main} thrown in /home/kibrisotoilan/public_html/vendor/visiosoft/streams-platform/tests/Unit/Support/CollectionTest.php on line 3