diff --git a/interfaces/event/AbstractCalendarQuery.php b/interfaces/event/AbstractCalendarQuery.php
index 4be924b4..516c16a0 100644
--- a/interfaces/event/AbstractCalendarQuery.php
+++ b/interfaces/event/AbstractCalendarQuery.php
@@ -14,7 +14,6 @@
 use Exception;
 use humhub\modules\calendar\helpers\CalendarUtils;
 use humhub\modules\calendar\models\CalendarEntry;
-use humhub\modules\calendar\models\CalendarEntryParticipant;
 use humhub\modules\content\components\ContentContainerActiveRecord;
 use humhub\modules\user\models\User;
 use humhub\modules\content\components\ActiveQueryContent;
@@ -1124,6 +1123,11 @@ public function filterIsParticipant()
         throw new FilterNotSupportedException('Participant filter not supported for this query');
     }
 
+    public function filterOrIsParticipant()
+    {
+        throw new FilterNotSupportedException('Participant filter not supported for this query');
+    }
+
     /**
      * Can be used to pre filter the result list
      * @param $result
diff --git a/tests/codeception/unit/reminder/ReminderProcessTest.php b/tests/codeception/unit/reminder/ReminderProcessTest.php
index 43df5bf2..7443944c 100644
--- a/tests/codeception/unit/reminder/ReminderProcessTest.php
+++ b/tests/codeception/unit/reminder/ReminderProcessTest.php
@@ -22,6 +22,9 @@ class ReminderProcessTest extends CalendarUnitTest
 {
     protected function setUp(): void
     {
+        parent::setUp();
+        Yii::$app->installationState->setInstalled();
+
         Yii::$app->getModule('calendar')->set(CalendarService::class, ['class' => CalendarService::class]);
         // Make sure we don't receive content created notifications
         Membership::updateAll(['send_notifications' => 0]);
@@ -86,8 +89,7 @@ public function testDisableEntryLevelReminderLevel()
     public function testDisableUserEntryLevelReminderLevel()
     {
         $space = Space::findOne(['id' => 3]);
-        $this->becomeUser('admin');
-        $user = User::findOne(['id' => 1]);
+        $user = $this->becomeUser('admin');
 
         // Entry begins exactly in one hour
         $entry = $this->createEntry((new DateTime())->add(new DateInterval('PT1H')), null, 'Test', $space);
@@ -105,7 +107,7 @@ public function testDisableUserEntryLevelReminderLevel()
         $entryLevelReminder = CalendarReminder::initEntryLevel(CalendarReminder::UNIT_HOUR, 2, $entry);
         $this->assertTrue($entryLevelReminder->save());
 
-        $userEntrylevelReminder = CalendarReminder::initDisableEntryLevelDefaults($entry, User::findOne(['id' => 1]));
+        $userEntrylevelReminder = CalendarReminder::initDisableEntryLevelDefaults($entry, $user);
         $this->assertTrue($userEntrylevelReminder->save());
 
         (new ReminderService())->sendAllReminder();