diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index e79317c..76d8326 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -15,6 +15,13 @@ jobs:
       matrix:
         python-version: ["3.5", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
         os: [ubuntu-latest, windows-latest, macOS-latest]
+        exclude:
+          # No longer supported on GitHub CI.
+          - python-version: 3.5
+            os: "ubuntu-latest"
+          - python-version: 3.6
+            os: "ubuntu-latest"
+
 
     steps:
     - uses: actions/checkout@v3