diff --git a/.github/workflows/unit-tests-all.yml b/.github/workflows/unit-tests-all.yml
index 6bce0a1..9fa31ea 100644
--- a/.github/workflows/unit-tests-all.yml
+++ b/.github/workflows/unit-tests-all.yml
@@ -12,8 +12,8 @@ jobs:
     continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.9", "3.10"]
+        os: [ubuntu-latest, windows-latest]
+        python-version: ["3.10", "3.11"]
         experimental: [false]
         # Include experimental or bleeding-edge releases.
         # Windows is not included as it can be unreliable, e.g.
@@ -28,10 +28,10 @@ jobs:
           # Example formatting: 3.11.0-alpha.1, 3.9.0-beta.8, 3.10.0-rc.3
           #
           - os: ubuntu-latest
-            python-version: "3.11.0"
+            python-version: "3.12.0"
             experimental: true
           - os: macos-latest
-            python-version: "3.11.0"
+            python-version: "3.12.0"
             experimental: true
     steps:
       - name: "check out repository"