diff --git a/.github/workflows/test-gnofract4d.yml b/.github/workflows/test-gnofract4d.yml
index 11c4a8ef..36b8ed64 100644
--- a/.github/workflows/test-gnofract4d.yml
+++ b/.github/workflows/test-gnofract4d.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-22.04]
-        python: ["3.10", "3.11", "3.12", "3.13-dev"]
+        python: ["3.9", "3.10", "3.11", "3.12", "3.13-dev"]
         toxenv: [py]
         # Ensure ../codecov.yml uploads after all py jobs
         include:
@@ -57,6 +57,7 @@ jobs:
       - name: Run Tox (MacOS)
         if: ${{ runner.os == 'macOS' }}
         run: tox -e ${{ matrix.toxenv }}
+        continue-on-error: true  # Gio introspection is broken: https://gitlab.gnome.org/GNOME/glib/-/issues/3322
       - name: Run Tox (Linux)
         if: ${{ runner.os == 'Linux' }}
         run: xvfb-run --auto-servernum tox -e ${{ matrix.toxenv }}