Fatal error: Uncaught Error: Class "HtmlToProseMirror\Test\TestCase" not found in /home/gingerbrup/gardien/vendor/ueberdosis/html-to-prosemirror/tests/Nodes/HorizontalRuleTest.php:8 Stack trace: #0 {main} thrown in /home/gingerbrup/gardien/vendor/ueberdosis/html-to-prosemirror/tests/Nodes/HorizontalRuleTest.php on line 8