diff --git a/contributing/code/tests.rst b/contributing/code/tests.rst
index 873f3c382eb..18be8ac55fc 100644
--- a/contributing/code/tests.rst
+++ b/contributing/code/tests.rst
@@ -44,7 +44,7 @@ Step 2: Install vendors
 
 .. code-block:: bash
 
-    $ php composer.phar --dev install
+    $ php composer.phar install
 
 .. note::
 
@@ -59,14 +59,14 @@ Step 2: Install vendors
     .. code-block:: bash
 
         $ php installer
-        $ php composer.phar --dev install
+        $ php composer.phar install
 
 After installation, you can update the vendors to their latest version with
 the follow command:
 
 .. code-block:: bash
 
-    $ php composer.phar --dev update
+    $ php composer.phar update
 
 Running
 -------