diff --git a/tox.ini b/tox.ini
index 42722c8..09ef9fd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,8 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-#envlist = py26, py27, pypy, py26requests, py27requests, pypyrequests, py26oldrequests, py27oldrequests, pypyoldrequests
-envlist = py26, py27, pypy, py26httplib2, py27httplib2, pypyhttplib2
+envlist = py26, py27, pypy, py26requests, py27requests, pypyrequests, py26oldrequests, py27oldrequests, pypyoldrequests, py26httplib2, py27httplib2, pypyhttplib2
 
 [testenv]
 commands =
@@ -66,6 +65,7 @@ deps =
 [testenv:py26httplib2]
 basepython = python2.6
 deps =
+    mock
     pytest
     PyYAML
     httplib2
@@ -73,6 +73,7 @@ deps =
 [testenv:py27httplib2]
 basepython = python2.7
 deps =
+    mock
     pytest
     PyYAML
     httplib2
@@ -80,6 +81,7 @@ deps =
 [testenv:pypyhttplib2]
 basepython = pypy
 deps =
+    mock
     pytest
     PyYAML
     httplib2