diff --git a/test/helper/common.bash b/test/helper/common.bash
index f523884..b5633eb 100644
--- a/test/helper/common.bash
+++ b/test/helper/common.bash
@@ -40,5 +40,7 @@ function crystal_spec() {
 }
 
 function crystal_format() {
+  $CRYSTAL tool format
+  git diff
   $CRYSTAL tool format --check
 }