diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 50b42d8f4..92b23af69 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -18,4 +18,4 @@ jobs:
     - run: npx tslint -c ionic-migration.json -p tsconfig.json
     - run: npm run test:ci
     - run: npm run build:prod
-    - run: result=$(find src -type f -iname '*.html' -exec grep -E 'class="[^"]+"[^>]+class="' {} \; | wc -l); test $result -eq 0
+    - run: result=$(find src -type f -iname '*.html' -exec sh -c 'cat {} | tr "\n" " " | grep -Eo "class=\"[^\"]+\"[^>]+class=\"" ' \; | wc -l); test $result -eq 0