diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 8b1a02baf..ec35e48f3 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -34,4 +34,6 @@ jobs:
 
       - name: Uncrustify check
         run: |
-          ~/uncrustify/uncrustify -c .uncrustify.cfg -l CPP --check */*.cpp */*.h
+          ~/uncrustify/uncrustify -c .uncrustify.cfg -l CPP --no-backup --replace */*.cpp */*.h
+          git diff
+          git diff | diff - /dev/null &> /dev/null