diff --git a/.github/workflows/check-a11y-of-changed-content.yaml b/.github/workflows/check-a11y-of-changed-content.yaml
index 5c65fddcd9..27cd94c704 100644
--- a/.github/workflows/check-a11y-of-changed-content.yaml
+++ b/.github/workflows/check-a11y-of-changed-content.yaml
@@ -23,6 +23,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Fetch gh-pages branch
+        run: git fetch origin origin/gh-pages && git branch gh-pages origin/gh-pages
+
       - name: Calculate URLs and output to JavaScript module
         run: sh ./generate_pa11y_ci_urls_from_git_diff.sh gh-pages