diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index 5bba8e690655fa..85c2c15fd89806 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -31,6 +31,10 @@ jobs:
       run: make -s -j4
     - name: 'Install build dependencies'
       run: make -C Doc/ PYTHON=../python venv
+    - name: 'Build documentation showing warnings'
+      uses: ammaraskar/sphinx-action@master
+      with:
+        docs-folder: "Doc/"
     - name: 'Build documentation'
       run: xvfb-run make -C Doc/ PYTHON=../python SPHINXOPTS="-q -W -j4" doctest suspicious html
     - name: 'Upload'
diff --git a/Doc/bugs.rst b/Doc/bugs.rst
index a17f04d26fa40b..a3ee425b9959fc 100644
--- a/Doc/bugs.rst
+++ b/Doc/bugs.rst
@@ -2,7 +2,7 @@
 
 *****************
 Dealing with Bugs
-*****************
+**************
 
 Python is a mature programming language which has established a reputation for
 stability.  In order to maintain this reputation, the developers would like to