diff --git a/tox.ini b/tox.ini
index cdc2c2396..4a7aea0d0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,17 +33,17 @@ setenv =
 
 [testenv:py33]
 commands =
-    pip install -e acme[dev,testing]
+    pip install -e acme[dns,testing]
     nosetests -v acme
 
 [testenv:py34]
 commands =
-    pip install -e acme[dev,testing]
+    pip install -e acme[dns,testing]
     nosetests -v acme
 
 [testenv:py35]
 commands =
-    pip install -e acme[dev,testing]
+    pip install -e acme[dns,testing]
     nosetests -v acme
 
 [testenv:cover]