diff --git a/tox.ini b/tox.ini
index 767210e8e..ea1cd04cb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,7 @@ setenv =
    VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/test-requirements.txt
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -type f -name "*.py[c|o]" -delete
   find . -type d -name "__pycache__" -delete
   ostestr --concurrency=6 {posargs}