unit test setUp call parent

filter.php

@@ -25,6 +25,4 @@
  */
 defined('MOODLE_INTERNAL') || die();
 
-class_alias(\filter_opencast\text_filter::class, \filter_opencast::class);
-
 debugging('This file is no longer required in Moodle 4.5+. Please do not include/require it.', DEBUG_DEVELOPER);

tests/replacement_test.php

@@ -39,6 +39,7 @@
 final class replacement_test extends \advanced_testcase {
 
     public function setUp(): void {
+        parent::setUp();
         $this->resetAfterTest();
         set_config('episodeurl_1', "http://localhost:8080/play/[EPISODEID]\nhttps://stable.opencast.de/play/[EPISODEID]",
                 'filter_opencast');