diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index a82859e1..91613f7c 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -34,6 +34,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python }}
+        allow-prereleases: true
     - name: Install nox
       run: |
         python -m pip install --upgrade setuptools pip wheel