solution

.github/workflows/test.yml

@@ -11,13 +11,19 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x]
+        node-version: [14.x]
 
     steps:
     - uses: actions/checkout@v2
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
-    - run: npm ci
-    - run: npm start & sleep 5 && npm test
+    - run: npm install
+    - run: npm test
+    - name: Upload HTML report(backstop data)
+      if: ${{ always() }}
+      uses: actions/upload-artifact@v2
+      with:
+        name: report
+        path: backstop_data

.linthtmlrc.json

@@ -38,7 +38,7 @@
   ],
   "tag-name-lowercase": true,
   "tag-name-match": true,
-  "tag-self-close": "never",
+  "tag-self-close": false,
   "tag-close": true,
   "text-ignore-regex": "&",
   "title-no-dup": true,