diff --git a/setup.cfg b/setup.cfg
index 79e5e35807cd1040c0a00a509a23cdcfd3fb6de2..04f5d0e0cd77b0595adadc83946ec443a0b11d81 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -132,6 +132,10 @@ deps =
 	{[options]install_requires}
 	{[options.extras_require]test}
 extras = test
+whitelist_externals = rm
+commands_pre =
+    rm -rf **/__pycache__
+    rm -rf **/*.pyc
 commands = 
 	pytest \
 	--cov={[metadata]name} \