diff --git a/apps/dav/lib/CalDAV/Reminder/Backend.php b/apps/dav/lib/CalDAV/Reminder/Backend.php
index 1fa30f2538bdb..f5608760b61fd 100644
--- a/apps/dav/lib/CalDAV/Reminder/Backend.php
+++ b/apps/dav/lib/CalDAV/Reminder/Backend.php
@@ -44,12 +44,12 @@ public function __construct(IDBConnection $db,
 	 */
 	public function getRemindersToProcess():array {
 		$query = $this->db->getQueryBuilder();
-		$query->select(['cr.*', 'co.calendardata', 'c.displayname', 'c.principaluri','cr.notification_date', 'cr.event_hash', 'cr.type'])
+		$query->select(['cr.id', 'cr.calendar_id','cr.object_id','cr.is_recurring','cr.uid','cr.recurrence_id','cr.is_recurrence_exception','cr.event_hash','cr.alarm_hash','cr.type','cr.is_relative','cr.notification_date','cr.is_repeat_based','co.calendardata', 'c.displayname', 'c.principaluri'])
 			->from('calendar_reminders', 'cr')
 			->where($query->expr()->lte('cr.notification_date', $query->createNamedParameter($this->timeFactory->getTime())))
 			->join('cr', 'calendarobjects', 'co', $query->expr()->eq('cr.object_id', 'co.id'))
 			->join('cr', 'calendars', 'c', $query->expr()->eq('cr.calendar_id', 'c.id'))
-			->groupBy('cr.event_hash', 'cr.notification_date', 'cr.type');
+			->groupBy('cr.event_hash', 'cr.notification_date', 'cr.type', 'cr.id', 'cr.calendar_id', 'cr.object_id', 'cr.is_recurring', 'cr.uid', 'cr.recurrence_id', 'cr.is_recurrence_exception', 'cr.alarm_hash', 'cr.is_relative', 'cr.is_repeat_based', 'co.calendardata', 'c.displayname', 'c.principaluri');
 		$stmt = $query->execute();
 
 		return array_map(
diff --git a/apps/dav/tests/unit/CalDAV/Reminder/BackendTest.php b/apps/dav/tests/unit/CalDAV/Reminder/BackendTest.php
index 75b058c0b848d..e1a0485f8a9c1 100644
--- a/apps/dav/tests/unit/CalDAV/Reminder/BackendTest.php
+++ b/apps/dav/tests/unit/CalDAV/Reminder/BackendTest.php
@@ -118,7 +118,7 @@ public function testGetRemindersToProcess(): void {
 		unset($rows[0]['id']);
 		unset($rows[1]['id']);
 
-		$this->assertEquals($rows[0], [
+		$expected1 = [
 			'calendar_id' => 1,
 			'object_id' => 1,
 			'uid' => 'asd',
@@ -127,15 +127,15 @@ public function testGetRemindersToProcess(): void {
 			'is_recurrence_exception' => false,
 			'event_hash' => 'asd123',
 			'alarm_hash' => 'asd567',
-			'type' => 'AUDIO',
+			'type' => 'EMAIL',
 			'is_relative' => true,
 			'notification_date' => 123456,
 			'is_repeat_based' => false,
 			'calendardata' => 'Calendar data 123',
 			'displayname' => 'Displayname 123',
 			'principaluri' => 'principals/users/user001',
-		]);
-		$this->assertEquals($rows[1], [
+		];
+		$expected2 = [
 			'calendar_id' => 1,
 			'object_id' => 1,
 			'uid' => 'asd',
@@ -144,14 +144,16 @@ public function testGetRemindersToProcess(): void {
 			'is_recurrence_exception' => false,
 			'event_hash' => 'asd123',
 			'alarm_hash' => 'asd567',
-			'type' => 'EMAIL',
+			'type' => 'AUDIO',
 			'is_relative' => true,
 			'notification_date' => 123456,
 			'is_repeat_based' => false,
 			'calendardata' => 'Calendar data 123',
 			'displayname' => 'Displayname 123',
 			'principaluri' => 'principals/users/user001',
-		]);
+		];
+
+		$this->assertEqualsCanonicalizing([$rows[0],$rows[1]], [$expected1,$expected2]);
 	}
 
 	public function testGetAllScheduledRemindersForEvent(): void {