diff --git a/.gitea/workflows/pr-checks.yml b/.gitea/workflows/pr-checks.yml
index 8c264ae..26ed66d 100644
--- a/.gitea/workflows/pr-checks.yml
+++ b/.gitea/workflows/pr-checks.yml
@@ -57,3 +57,7 @@ jobs:
       # not portable across the Node versions this project runs on.
       - name: Test the checker itself
         run: node --test scripts/checkPlugin.test.js
+
+      # The staging drill's pure parts (tools/drill/drill.js): its stall limit and fresh-data list.
+      - name: Test the staging drill
+        run: node --test tools/drill/drill.test.js