diff --git a/.gitea/workflows/validate-changelog-filenames.yml b/.gitea/workflows/validate-changelog-filenames.yml
index 6feedc8..03eee97 100644
--- a/.gitea/workflows/validate-changelog-filenames.yml
+++ b/.gitea/workflows/validate-changelog-filenames.yml
@@ -20,14 +20,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout full history
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
+        run: |
+          git init -q .
+          git remote add origin "${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}.git"
+          git fetch --no-tags --prune origin \
+            "+refs/heads/*:refs/remotes/origin/*" \
+            "+refs/pull/*/head:refs/remotes/pull/*/head" \
+            "+refs/pull/*/merge:refs/remotes/pull/*/merge"
+          git checkout --detach "$GITHUB_SHA"
 
-      - name: Set up Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: '20'
+      - name: Verify Node.js runtime
+        run: |
+          node --version
+          npm --version
+          node -e "if (Number(process.versions.node.split('.')[0]) < 20) process.exit(1)"
 
       - name: Run regression tests
         run: npm test