diff --git a/tox.ini b/tox.ini
index e3c69cf..b08e0cd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,7 @@ changedir = {envtmpdir}
 commands =
     py.test [] {toxinidir}/jsonschema
     {envpython} -m doctest {toxinidir}/README.rst
-    py{26,27,34,py}: sphinx-build -b doctest {toxinidir}/docs {envtmpdir}/html
+    py{26,27,34}: sphinx-build -b doctest {toxinidir}/docs {envtmpdir}/html
 deps =
     pytest