diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 3e875f7..cc02c9e 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -31,7 +31,7 @@
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: ['macOS-latest', 'ubuntu-20.04']
+        os: ['macOS-12', 'ubuntu-20.04']
         # TODO: Revert back to 3.7 once the Mac agent's Python v3.7 contains bz2 again,
         # the issue can be tracked via https://github.com/actions/setup-python/issues/682.
         python-version: ['3.7.16', '3.8']