diff --git a/.gitattributes b/.gitattributes
index c922b03c93..d0c2d266b4 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -5,3 +5,4 @@ bin/* diff=ruby
 tool/update-deps diff=ruby
 tool/make-snapshot diff=ruby
 tool/format-release diff=ruby
+tool/leaked-globals diff=ruby