Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/clapsabo/test/vendor/api-platform/core/tests/Serializer/SerializerContextBuilderTest.php:27 Stack trace: #0 {main} thrown in /home/clapsabo/test/vendor/api-platform/core/tests/Serializer/SerializerContextBuilderTest.php on line 27