diff --git a/tox.ini b/tox.ini
index 5b4dcc017..5df35c8d3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -71,6 +71,8 @@ pass_env =
   NO_COLOR
   CLICOLOR
   CLICOLOR_FORCE
+set_env =
+  py313: PYTHON_GIL=0
 extras = test
 deps =
   # General minimum dependencies: pin based on API usage