diff --git a/docs/source/development.rst b/docs/source/development.rst
index bf3e3d22..dc3446da 100644
--- a/docs/source/development.rst
+++ b/docs/source/development.rst
@@ -209,7 +209,7 @@ For further information, see :ref:`Internals / Trusted Advisor <internals.truste
 Unit Testing
 ------------
 
-Testing is done via `pytest <http://pytest.org/latest/>`_, driven by `tox <https://tox.readthedocs.org/>`_.
+Testing is done via `pytest <http://pytest.org/en/latest/>`_, driven by `tox <https://tox.readthedocs.org/>`_.
 
 * testing is as simple as: