diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f4e1bac3c5..8e0cc2acff 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -137,9 +137,9 @@ jobs:
         echo "Running tests..."
         if [[ "x${{ github.event.inputs.ignoreLowerCoverage }}" == "xtrue" ]]; then
           echo "Lower coverage failures will be ignored."
-          ./ietf/manage.py test --settings=settings_postgrestest --ignore-lower-coverage
+          ./ietf/manage.py test --validate-html-harder --settings=settings_postgrestest --ignore-lower-coverage
         else
-          ./ietf/manage.py test --settings=settings_postgrestest
+          ./ietf/manage.py test --validate-html-harder --settings=settings_postgrestest
         fi
         coverage xml