diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8a123b8..21e9204 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -14,6 +14,8 @@ jobs:
       - uses: actions/checkout@v2
       - run: npm ci
       - run: npm run all
+      # make sure the latest dist/ changes have been pushed
+      - run: git diff --quiet
   test: # make sure the action works on a clean machine without building
     runs-on: ubuntu-latest
     steps: