diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7084b0a03e..b447c5e5e7 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -408,3 +408,7 @@ jobs:
           retention-days: 7
           if-no-files-found: ignore
           include-hidden-files: true
+      - name: Compare SimpleCov results with Undercover
+        run: |
+          git fetch --no-tags origin master:master
+          bundle exec undercover