diff --git a/tox.ini b/tox.ini
index d8fc77658..d9be7f410 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,12 @@ deps=
     nose
     mock
 
+[testenv:py26]
+commands= py.test --lsof -rfsxX {posargs:testing}
+deps=
+    nose
+    mock<1.1  # last supported version for py26
+
 [testenv:py27-subprocess]
 changedir=.
 basepython=python2.7