diff --git a/tools/test-requires b/tools/test-requires
index 2befbbb386..c44028fbcd 100644
--- a/tools/test-requires
+++ b/tools/test-requires
@@ -2,9 +2,9 @@
 distribute>=0.6.24
 
 coverage
-mox
+mox==0.5.3
 nose
 nosexcover
-openstack.nose_plugin
-pep8>=1.0
-sphinx
+openstack.nose_plugin>=0.7
+pep8==1.1
+sphinx>=1.1.2
diff --git a/tox.ini b/tox.ini
index 3340d5ef16..98f1dbf0dc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,7 @@ deps = -r{toxinidir}/tools/pip-requires
 commands = nosetests -a tag='unit'
 
 [testenv:pep8]
-deps = pep8
+deps = pep8==1.1
 commands = pep8 --repeat --show-source heat setup.py
 
 [testenv:venv]