diff --git a/tox.ini b/tox.ini
index b0afd479a..f5528bb17 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:genscript]
 commands= py.test --genscript=pytest1