diff --git a/tox.ini b/tox.ini
index e8e7d7ebb8..dbd1652d10 100644
--- a/tox.ini
+++ b/tox.ini
@@ -49,3 +49,13 @@ setenv =
   TOP_DIR={toxinidir}
 commands =
   python setup.py build_sphinx
+
+[testenv:venv]
+deps =
+   pbr>=0.6,!=0.7,<1.0
+   sphinx>=1.1.2,<1.2
+   oslosphinx
+   blockdiag
+   sphinxcontrib-blockdiag
+   sphinxcontrib-nwdiag
+commands = {posargs}