diff --git a/tox.ini b/tox.ini
index 6a4c899b5a2..acd56aecc8e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,7 +23,7 @@ deps = -r{toxinidir}/test-requirements.txt
 # the concurrency=<n> option.
 # call ie: 'tox -epy27 -- --concurrency=4'
 commands =
-  find . -type f -name "*.pyc" -delete
+  find . -ignore_readdir_race -type f -name "*.pyc" -delete
   stestr run '{posargs}'
   stestr slowest