diff --git a/tox.ini b/tox.ini
index b1e7491..6c2103e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,11 +1,18 @@
 [tox]
 envlist = py26,py27
 
+[testenv:py26]
+commands=
+    pip install -r requirements.txt
+    py.test --cov .tox/py26/lib/python2.6/site-packages/raft tests/unit
+
+[testenv:py27]
+commands=
+    pip install -r requirements.txt
+    py.test --cov .tox/py27/lib/python2.7/site-packages/raft tests/unit
+
 [testenv]
 deps=
     pytest
     pytest-cov
     mock
-commands=
-    pip install -r requirements.txt
-    py.test --cov raft tests/unit