diff --git a/tox.ini b/tox.ini
index 90917ea2..48043c94 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,8 +1,8 @@
 [tox]
 envlist = py38-django40
-allowlist_externals = *
 
 [testenv]
+allowlist_externals = ./runtests.py
 setenv =
     PYTHONDONTWRITEBYTECODE=1
 deps =