@@ -112,14 +112,19 @@ jobs:
         run: pytest --runtime coreclr
 
       - name: Python Tests (Mono)
-        if: always()
+        if: ${{ always() && matrix.os.category == 'windows' }}
+        run: pytest --runtime mono
+
+      - name: Python Tests (Mono, with diagnostics)
         # Bound the recurring x64-ubuntu Mono hang so partial logs are flushed
         # before kill; local runs take ~40s, give ourselves 8x.
+        # Skipped on Windows where the default shell is pwsh.
+        if: ${{ always() && matrix.os.category != 'windows' }}
         timeout-minutes: 6
         run: |
           set -x
           echo "[mono-step] entering pytest" && date
-          stdbuf -oL -eL python -u -m pytest -v --runtime mono
+          python -u -m pytest -v --runtime mono
           echo "[mono-step] pytest exited" && date
 
       - name: Python Tests (.NET Framework)