diff --git a/apps/dav/lib/BackgroundJob/RefreshWebcalJob.php b/apps/dav/lib/BackgroundJob/RefreshWebcalJob.php
index 871734aab5565..da4631217fb77 100644
--- a/apps/dav/lib/BackgroundJob/RefreshWebcalJob.php
+++ b/apps/dav/lib/BackgroundJob/RefreshWebcalJob.php
@@ -144,6 +144,7 @@ protected function run($argument) {
 				$uid = null;
 				$compName = null;
 
+				/* @phan-suppress-next-line PhanUndeclaredClassMethod */
 				foreach ($vObject->getComponents() as $component) {
 					if ($component->name === 'VTIMEZONE') {
 						continue;
@@ -165,6 +166,7 @@ protected function run($argument) {
 				}
 
 				$uri = $uid . '.ics';
+				/* @phan-suppress-next-line PhanUndeclaredClassMethod */
 				$calendarData = $vObject->serialize();
 				try {
 					$this->calDavBackend->createCalendarObject($subscription['id'], $uri, $calendarData, CalDavBackend::CALENDAR_TYPE_SUBSCRIPTION);