diff --git a/.gitignore b/.gitignore
index 453211a30e..68dbb7588a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,6 +41,7 @@ tags
 /src/nvim/testdir/X*
 /src/nvim/testdir/valgrind.*
 /src/nvim/testdir/.gdbinit
+/runtime/indent/testdir/*.out
 
 # Generated by unit tests.
 /test/includes/post/