https://github.com/actions/setup-python/issues/177

Author: oittaa

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', 'pypy-3.7']
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10-dev', 'pypy-3.7']
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python ${{ matrix.python-version }}