diff --git a/tox.ini b/tox.ini
index 66f9280..9ba38ee 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,6 +11,7 @@ filterwarnings =
 #log_cli = true
 #log_cli_level = DEBUG
 pep8ignore = W503
+cache_dir = ${RESULTS}/.__pycache__
 
 [pep8]
 ignore = W503