diff --git a/tox.ini b/tox.ini
index c7c7d7e..3ed1114 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ deps = -r{toxinidir}/requirements.txt
 whitelist_externals = bash
                       find
 commands =
-    find . -type f -name "*.pyc" -delete
+    find . -type f -name "*.py[c|o]" -delete
     nosetests
 
 [testenv:pep8]