diff --git a/testing/end_to_end.rst b/testing/end_to_end.rst
index bb4a316f347..83d61b1e60f 100644
--- a/testing/end_to_end.rst
+++ b/testing/end_to_end.rst
@@ -26,7 +26,7 @@ to install the needed dependencies:
 
 .. code-block:: terminal
 
-    $ composer require symfony/panther
+    $ composer require --dev symfony/panther
 
 .. include:: /components/require_autoload.rst.inc