diff --git a/tox.ini b/tox.ini
index bef7d95..2bcd8bc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,6 +7,7 @@ envlist =
 	py32,
 	py33,
 	py34,
+	sphinx,
 
 
 [testenv]
@@ -31,3 +32,13 @@ commands =
 [testenv:pep257]
 commands =
 	pep257 --ignore D200,D202,D203 django12factor
+
+[testenv:sphinx]
+deps =
+	Sphinx
+changedir = {toxinidir}/docs/
+whitelist_externals =
+	make
+commands =
+	make html
+	make doctest coverage