diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index beeb3b2..41e6fb6 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -35,7 +35,7 @@ jobs:
 
     - name: Report code coverage
       if: ${{ github.event_name == 'pull_request' }}
-      uses: zgosalvez/github-actions-report-lcov@v3
+      uses: zgosalvez/github-actions-report-lcov@v4
       with:
         coverage-files: build/filtered_coverage.info
         minimum-coverage: 80
diff --git a/test/coverage.sh b/test/coverage.sh
index 1d4da14..46caba4 100644
--- a/test/coverage.sh
+++ b/test/coverage.sh
@@ -7,7 +7,9 @@ build_dir="$base_dir/build"
 ${base_dir}/build.sh clean debug without_examples
 
 echo "generate coverage.info:"
-lcov --capture --directory . --output-file "${build_dir}/coverage.info"
+lcov --capture --directory . --output-file "${build_dir}/coverage.info" \
+     --no-external --ignore-errors empty --ignore-errors mismatch \
+     --rc geninfo_unexecuted_blocks=1
 
 echo "generate filtered_coverage.info:"
 lcov --extract "${build_dir}/coverage.info" '*/bw/webthing/*' --output-file "${build_dir}/filtered_coverage.info"