diff --git a/app/Notifications/OrderShipmentNotification.php b/app/Notifications/OrderShipmentNotification.php
index e164b59..3dd8b27 100644
--- a/app/Notifications/OrderShipmentNotification.php
+++ b/app/Notifications/OrderShipmentNotification.php
@@ -8,7 +8,7 @@
 use Illuminate\Notifications\Messages\MailMessage;
 use Illuminate\Notifications\Notification;
 
-class OrderShipmentNotification extends Notification
+class OrderShipmentNotification extends Notification implements ShouldQueue
 {
     use Queueable;
 
diff --git a/tests/Feature/NotificationTest.php b/tests/Feature/NotificationTest.php
index 55e7cd2..3999159 100644
--- a/tests/Feature/NotificationTest.php
+++ b/tests/Feature/NotificationTest.php
@@ -7,6 +7,7 @@
 use App\Models\User;
 use App\Notifications\OrderShipmentNotification;
 use Illuminate\Auth\Notifications\ResetPassword;
+use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Illuminate\Foundation\Testing\WithFaker;
 use Illuminate\Notifications\Messages\MailMessage;
@@ -88,4 +89,13 @@ public function password_can_be_reset_with_valid_token()
             return true;
         });
     }
+
+    /** @test */
+    public function a_notification_can_be_instructed_to_be_queued()
+    {
+        $this->assertInstanceOf(
+            ShouldQueue::class,
+            app(OrderShipmentNotification::class)
+        );
+    }
 }