diff --git a/tox.ini b/tox.ini
index 81ef8c77..69458280 100644
--- a/tox.ini
+++ b/tox.ini
@@ -38,6 +38,8 @@ pass_env =
   CLICOLOR
   CLICOLOR_FORCE
   PYTHON_GIL
+deps =
+  py313: traits @ git+https://github.com/enthought/traits.git@10954eb
 extras = test
 setenv =
   pre: UV_EXTRA_INDEX_URL=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple