diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bed4addf..47f93677 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -45,7 +45,7 @@ jobs:
       - run: opam exec -- dune build @lint
 
       # check that nothing changed
-      - run: git diff --quiet --exit-code
+      - run: git diff --exit-code
 
       - run: opam exec -- dune build @runtest
         if: ${{ matrix.os == 'ubuntu-latest' }}