[Testing] Add a missing cross reference

Author: javiereguiluz

components/browser_kit.rst

@@ -73,7 +73,7 @@ and traversing HTML elements programmatically.
 
     After making a request, subsequent requests will make the client to
     reboot the kernel. This clears the security token, detaches Doctrine
-    entities, etc. Read more about :ref:`making multiple requests in the same test`.
+    entities, etc. Read more about :ref:`making multiple requests in the same test <testing-multiple-requests-in-one-test>`.
 
 The :method:`Symfony\\Component\\BrowserKit\\AbstractBrowser::jsonRequest` method,
 which defines the same arguments as the ``request()`` method, is a shortcut to

testing.rst

@@ -585,6 +585,8 @@ This allows you to create all types of requests you can think of:
     :ref:`framework.test <reference-framework-test>` option is enabled).
     This means you can override the service entirely if you need to.
 
+.. _testing-multiple-requests-in-one-test:
+
 Multiple Requests in One Test
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