diff --git a/src/Bundle/ChillMainBundle/Tests/Entity/NotificationTest.php b/src/Bundle/ChillMainBundle/Tests/Entity/NotificationTest.php
index 6343800d5..6bf966bbb 100644
--- a/src/Bundle/ChillMainBundle/Tests/Entity/NotificationTest.php
+++ b/src/Bundle/ChillMainBundle/Tests/Entity/NotificationTest.php
@@ -27,7 +27,7 @@ final class NotificationTest extends KernelTestCase
 {
     private array $toDelete = [];
 
-    protected function setUp()
+    protected function setUp(): void
     {
         self::bootKernel();
     }
@@ -70,15 +70,21 @@ final class NotificationTest extends KernelTestCase
         $notification->addAddressee($user1 = new User());
         $notification->addAddressee($user2 = new User());
         $notification->getAddressees()->add($user3 = new User());
+        $notification->getAddressees()->add($user4 = new User());
 
-        $this->assertCount(3, $notification->getAddressees());
+        $this->assertCount(4, $notification->getAddressees());
 
         // launch listener
         $notification->registerUnread();
-        $this->assertCount(3, $notification->getUnreadBy());
+        $this->assertCount(4, $notification->getUnreadBy());
         $this->assertContains($user1, $notification->getUnreadBy()->toArray());
         $this->assertContains($user2, $notification->getUnreadBy()->toArray());
         $this->assertContains($user3, $notification->getUnreadBy()->toArray());
+
+        $notification->markAsReadBy($user1);
+
+        $this->assertCount(3, $notification->getUnreadBy());
+        $this->assertNotContains($user1, $notification->getUnreadBy()->toArray());
     }
 
     /**