diff --git a/tox.ini b/tox.ini
index ad30659f..755b9b34 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,10 @@ setenv = VIRTUAL_ENV={envdir}
          NOSE_OPENSTACK_STDOUT=1
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-commands = nosetests {posargs}
+commands = find . -type f -name "*.pyc" -delete
+           nosetests {posargs}
+
+whitelist_externals = find
 
 [tox:jenkins]
 sitepackages = True