diff --git a/tools/testing/selftests/damon/sysfs.sh b/tools/testing/selftests/damon/sysfs.sh
index b66593c9ac47..1cc7ab2d7e22 100755
--- a/tools/testing/selftests/damon/sysfs.sh
+++ b/tools/testing/selftests/damon/sysfs.sh
@@ -212,6 +212,9 @@ test_goal()
 	ensure_write_succ "$fpath" "node_eligible_mem_bp" "valid input"
 	ensure_write_succ "$fpath" "hugepage_mem_bp" "valid input"
 	ensure_write_fail "$fpath" "foo" "invalid input"
+	ensure_file "$goal_dir/complement" "exist" "600"
+	ensure_write_succ "$goal_dir/complement" "Y" "valid input"
+	ensure_write_succ "$goal_dir/complement" "N" "valid input"
 	ensure_file "$goal_dir/nid" "exist" "600"
 	ensure_file "$goal_dir/path" "exist" "600"
 }