diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 59d96bf6..8ff1f984 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -15,7 +15,7 @@ jobs:
         - os: ubuntu-22.04
           python-version: 3.9
         - os: ubuntu-22.04
-          python-version: '3.12'
+          python-version: '3.13-dev'
         - os: ubuntu-22.04
           python-version: 'pypy3.9'
         - os: macos-latest