diff --git a/docs/development/getting-started.rst b/docs/development/getting-started.rst
index d2d13a1..412f054 100644
--- a/docs/development/getting-started.rst
+++ b/docs/development/getting-started.rst
@@ -55,8 +55,13 @@
 While testing you may want to run tests against a subset of the backends that
 cryptography supports. Explicit backend selection can be done via the
 ``--backend`` flag. This flag should be passed to ``py.test`` with a comma
-delimited list of backend names. To use it with ``tox`` you must pass it as
-``tox -- --backend=openssl``.
+delimited list of backend names.
+
+
+.. code-block:: console
+
+    $ tox -- --backend=openssl
+    $ py.test --backend=openssl,commoncrypto
 
 Building Documentation
 ~~~~~~~~~~~~~~~~~~~~~~