diff --git a/tox.ini b/tox.ini
index d8353e8..bde76cd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,9 +9,11 @@ setenv = VIRTUAL_ENV={envdir}
 usedevelop = True
 install_command = pip install -U {opts} {packages}
 deps = -r{toxinidir}/test-requirements.txt
-commands = python monasca_test_setup.py
+commands = find . -type f -name "*.pyc" -delete
+           python monasca_test_setup.py
            python setup.py testr --slowest --testr-args="{posargs}"
 whitelist_externals = bash
+                      find
 
 [testenv:pep8]
 deps = -r{toxinidir}/pep8-test-requirements.txt