diff --git a/.github/workflows/mintest.yaml b/.github/workflows/mintest.yaml
index 6fbe2c640..4161d51ea 100644
--- a/.github/workflows/mintest.yaml
+++ b/.github/workflows/mintest.yaml
@@ -6,6 +6,10 @@ on:
   push:
     branches:
       - master
+  # TODO(vytas): Remove once demonstrated in a PR.
+  pull_request:
+    branches:
+      - master
 
 jobs:
   run_tox:
@@ -18,6 +22,7 @@ jobs:
           - "3.8"
           - "3.10"
           - "3.11"
+          - "3.12"
 
     steps:
       - name: Checkout repo