diff --git a/core/BackgroundJobs/BackgroundCleanupUpdaterBackupsJob.php b/core/BackgroundJobs/BackgroundCleanupUpdaterBackupsJob.php
index e9096c99b44..b0acd89910c 100644
--- a/core/BackgroundJobs/BackgroundCleanupUpdaterBackupsJob.php
+++ b/core/BackgroundJobs/BackgroundCleanupUpdaterBackupsJob.php
@@ -43,7 +43,7 @@ class BackgroundCleanupUpdaterBackupsJob extends QueuedJob {
 	/**
 	 * This job cleans up all backups except the latest 3 from the updaters backup directory
 	 */
-	public function run($arguments) {
+	public function run($arguments): void {
 		$updateDir = $this->config->getSystemValue('updatedirectory', null) ?? $this->config->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data');
 		$instanceId = $this->config->getSystemValue('instanceid', null);
 
diff --git a/core/BackgroundJobs/LookupServerSendCheckBackgroundJob.php b/core/BackgroundJobs/LookupServerSendCheckBackgroundJob.php
index decfbc08ea2..7562436d6f2 100644
--- a/core/BackgroundJobs/LookupServerSendCheckBackgroundJob.php
+++ b/core/BackgroundJobs/LookupServerSendCheckBackgroundJob.php
@@ -40,7 +40,7 @@ class LookupServerSendCheckBackgroundJob extends QueuedJob {
 		parent::__construct($time);
 	}
 
-	public function run($arguments) {
+	public function run($arguments): void {
 		$this->userManager->callForSeenUsers(function (IUser $user) {
 			$this->config->setUserValue($user->getUID(), 'lookup_server_connector', 'dataSend', '1');
 		});