diff --git a/.gitea/workflows/runner-canary.yml b/.gitea/workflows/runner-canary.yml
new file mode 100644
index 0000000..a00ab54
--- /dev/null
+++ b/.gitea/workflows/runner-canary.yml
@@ -0,0 +1,17 @@
+name: Runner Canary
+
+on:
+  push:
+  workflow_dispatch:
+
+jobs:
+  runner-canary:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Verify isolated job runtime
+        run: |
+          set -eu
+          uname -a
+          test -f /etc/os-release
+          cat /etc/os-release
+          echo "runner-canary-ok"