diff --git a/tox.ini b/tox.ini
index 50b5bb1b..f698cd6f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,5 +9,5 @@ deps = -rdev-requirements.txt
 ignore = E501
 
 [pytest]
-norecursedirs = old_tests
+norecursedirs = old_tests .tox