diff --git a/framework/core/src/Notification/Driver/GroupableNotificationDriverInterface.php b/framework/core/src/Notification/Driver/GroupableNotificationDriverInterface.php
index 0e7921e3e..6882d80a5 100644
--- a/framework/core/src/Notification/Driver/GroupableNotificationDriverInterface.php
+++ b/framework/core/src/Notification/Driver/GroupableNotificationDriverInterface.php
@@ -1,10 +1,16 @@
 <?php
 
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
 namespace Flarum\Notification\Driver;
 
 interface GroupableNotificationDriverInterface extends NotificationDriverInterface
 {
-
     /**
      * Implies the delay to wait before sending out notifications to allow blueprintGrouping to happen.
      *
diff --git a/framework/core/src/Notification/Job/DelayedBlueprintGroupingJob.php b/framework/core/src/Notification/Job/DelayedBlueprintGroupingJob.php
index 2405a758a..a7bd771ae 100644
--- a/framework/core/src/Notification/Job/DelayedBlueprintGroupingJob.php
+++ b/framework/core/src/Notification/Job/DelayedBlueprintGroupingJob.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
 namespace Flarum\Notification\Job;
 
 use Flarum\Notification\Blueprint\BlueprintInterface;
@@ -23,13 +30,12 @@ class DelayedBlueprintGroupingJob extends AbstractJob
 
     public function handle()
     {
-
     }
 
     public function middleware()
     {
         return [
-            (new WithoutOverlapping('delayed-blueprint-grouping:' . $this->user->id))->dontRelease()
+            (new WithoutOverlapping('delayed-blueprint-grouping:'.$this->user->id))->dontRelease()
         ];
     }
 }
diff --git a/framework/core/src/Notification/NotificationSyncer.php b/framework/core/src/Notification/NotificationSyncer.php
index 564199bea..332a9f0e1 100644
--- a/framework/core/src/Notification/NotificationSyncer.php
+++ b/framework/core/src/Notification/NotificationSyncer.php
@@ -120,7 +120,7 @@ class NotificationSyncer
             if ($driver instanceof GroupableNotificationDriverInterface) {
                 $delay = $driver->blueprintGroupingDelay();
 
-                foreach($newRecipients as $recipient) {
+                foreach ($newRecipients as $recipient) {
                     $job = new DelayedBlueprintGroupingJob(
                         $blueprint,
                         $recipient,