diff --git a/.clang-tidy b/.clang-tidy
index 9c1e74231..f2c3593c4 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -38,5 +38,7 @@ CheckOptions:
   - key: hicpp-special-member-functions.AllowSoleDefaultDtor
     value: 1
 
+WarningsAsErrors: '*'
+
 #HeaderFilterRegex: '.*nlohmann.*'
-HeaderFilterRegex: '^(.*doctest.h)$'
+HeaderFilterRegex: 'include/.*'
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 817672396..c7bc8c306 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -131,4 +131,9 @@ jobs:
         uses: actions/upload-artifact@v2
         with:
           name: code-coverage-report
-          path: build_coverage/html
+          path: build/build_coverage/html
+      - name: Coveralls
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          path-to-lcov: build/build_coverage/json.info