diff --git a/core/Application.php b/core/Application.php
index cfbb8f4018a17..808b8a266d92d 100644
--- a/core/Application.php
+++ b/core/Application.php
@@ -25,6 +25,7 @@
 use OCP\DB\Events\AddMissingIndicesEvent;
 use OCP\DB\Events\AddMissingPrimaryKeyEvent;
 use OCP\EventDispatcher\IEventDispatcher;
+use OCP\Notification\IManager as INotificationManager;
 use OCP\User\Events\BeforeUserDeletedEvent;
 use OCP\User\Events\UserDeletedEvent;
 use OCP\Util;
@@ -48,7 +49,7 @@ public function __construct() {
 		/** @var IEventDispatcher $eventDispatcher */
 		$eventDispatcher = $server->get(IEventDispatcher::class);
 
-		$notificationManager = $server->getNotificationManager();
+		$notificationManager = $server->get(INotificationManager::class);
 		$notificationManager->registerNotifierService(CoreNotifier::class);
 		$notificationManager->registerNotifierService(AuthenticationNotifier::class);
 
diff --git a/lib/private/Repair.php b/lib/private/Repair.php
index fa27932545319..2b4159b599470 100644
--- a/lib/private/Repair.php
+++ b/lib/private/Repair.php
@@ -60,6 +60,7 @@
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Migration\IOutput;
 use OCP\Migration\IRepairStep;
+use OCP\Notification\IManager as INotificationManager;
 use Psr\Log\LoggerInterface;
 use Throwable;
 
@@ -168,7 +169,7 @@ public static function getRepairSteps(): array {
 			new AddCleanupUpdaterBackupsJob(\OC::$server->getJobList()),
 			new CleanupCardDAVPhotoCache(\OC::$server->getConfig(), \OC::$server->getAppDataDir('dav-photocache'), \OC::$server->get(LoggerInterface::class)),
 			new AddClenupLoginFlowV2BackgroundJob(\OC::$server->getJobList()),
-			new RemoveLinkShares(\OC::$server->getDatabaseConnection(), \OC::$server->getConfig(), \OC::$server->getGroupManager(), \OC::$server->getNotificationManager(), \OCP\Server::get(ITimeFactory::class)),
+			new RemoveLinkShares(\OC::$server->getDatabaseConnection(), \OC::$server->getConfig(), \OC::$server->getGroupManager(), \OC::$server->get(INotificationManager::class), \OCP\Server::get(ITimeFactory::class)),
 			new ClearCollectionsAccessCache(\OC::$server->getConfig(), \OCP\Server::get(IManager::class)),
 			\OCP\Server::get(ResetGeneratedAvatarFlag::class),
 			\OCP\Server::get(EncryptionLegacyCipher::class),
diff --git a/lib/private/User/User.php b/lib/private/User/User.php
index 06ec6db606648..644d3e27f881e 100644
--- a/lib/private/User/User.php
+++ b/lib/private/User/User.php
@@ -23,6 +23,7 @@
 use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserBackend;
+use OCP\Notification\IManager as INotificationManager;
 use OCP\User\Backend\IGetHomeBackend;
 use OCP\User\Backend\IProvideAvatarBackend;
 use OCP\User\Backend\IProvideEnabledStateBackend;
@@ -271,9 +272,9 @@ public function delete() {
 			$avatarManager = \OCP\Server::get(AvatarManager::class);
 			$avatarManager->deleteUserAvatar($this->uid);
 
-			$notification = \OC::$server->getNotificationManager()->createNotification();
+			$notification = \OC::$server->get(INotificationManager::class)->createNotification();
 			$notification->setUser($this->uid);
-			\OC::$server->getNotificationManager()->markProcessed($notification);
+			\OC::$server->get(INotificationManager::class)->markProcessed($notification);
 
 			/** @var AccountManager $accountManager */
 			$accountManager = \OCP\Server::get(AccountManager::class);