diff --git a/tox.ini b/tox.ini
index 51cb61825..24c0cac84 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,9 @@ deps =
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
 commands = stestr run --slowest {posargs}
+allowlist_externals =
+  bash
+  ./run-flake8
 
 [testenv:venv]
 commands = {posargs}