diff --git a/src/Controllers/QueuedJobsAdmin.php b/src/Controllers/QueuedJobsAdmin.php
index 29b49517..e960719c 100644
--- a/src/Controllers/QueuedJobsAdmin.php
+++ b/src/Controllers/QueuedJobsAdmin.php
@@ -94,7 +94,7 @@ public function getEditForm($id = null, $fields = null)
     {
         $form = parent::getEditForm($id, $fields);
 
-        $filter = $this->jobQueue->getJobListFilter(null, self::config()->max_finished_jobs_age);
+        $filter = $this->jobQueue->getJobListFilter(null, static::config()->max_finished_jobs_age);
 
         $list = QueuedJobDescriptor::get()->where($filter)->sort('Created', 'DESC');
 
@@ -199,7 +199,7 @@ public function createjob($data, Form $form)
 
             // If the user has select the European date format as their setting then replace '/' with '-' in the
             // date string so PHP treats the date as this format.
-            if (Security::getCurrentUser()->DateFormat == self::$date_format_european) {
+            if (Security::getCurrentUser()->DateFormat == QueuedJobsAdmin::$date_format_european) {
                 $time = str_replace('/', '-', $time ?? '');
             }
 
diff --git a/src/Services/QueuedJobService.php b/src/Services/QueuedJobService.php
index 69edadf7..20eddc46 100644
--- a/src/Services/QueuedJobService.php
+++ b/src/Services/QueuedJobService.php
@@ -1321,7 +1321,7 @@ public function getJobListFilter($type = null, $includeUpUntil = 0)
      */
     public function runQueue($queue)
     {
-        if (!self::config()->get('disable_health_check')) {
+        if (!static::config()->get('disable_health_check')) {
             $this->checkJobHealth($queue);
         }
         $this->checkdefaultJobs($queue);