diff --git a/tox.ini b/tox.ini
index 3ded131..2bc5377 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,7 @@ setenv =
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -type f -name "*.py[c|o]" -delete
   python setup.py testr --slowest --testr-args='{posargs}'
 
 [testenv:bandit]