diff --git a/tests/Util/SerializableObjectDouble.php b/tests/Util/SerializableObjectDouble.php
index 5c40a04d8b..e159655012 100644
--- a/tests/Util/SerializableObjectDouble.php
+++ b/tests/Util/SerializableObjectDouble.php
@@ -21,7 +21,7 @@
 
 namespace Friendica\Test\Util;
 
-class SerializableObjectDouble implements \Serializable#
+class SerializableObjectDouble implements \Serializable
 {
 	public function serialize()
 	{