diff --git a/testing.rst b/testing.rst
index 43caae024e3..bb1675d5fc0 100644
--- a/testing.rst
+++ b/testing.rst
@@ -128,6 +128,13 @@ tests as far as PHPUnit is concerned, but they have a very specific workflow:
 * Test the response;
 * Rinse and repeat.
 
+Before creating your first test, install these packages that provide some of the
+utilities used in the functional tests:
+
+.. code-block:: terminal
+
+    $ composer require --dev symfony/browser-kit symfony/css-selector
+
 Your First Functional Test
 ~~~~~~~~~~~~~~~~~~~~~~~~~~