diff --git a/tox.ini b/tox.ini
index be78df48f..ba10be7df 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,6 +23,7 @@ deps =
     pytest
     pytest-aiohttp
     coverage
+allowlist_externals = mkdir
 commands =
     mkdir -p plugins/magma/assets
     coverage run -p -m pytest --tb=short --asyncio-mode=auto tests