diff --git a/spec/example_app/app/assets/stylesheets/admin.css b/spec/example_app/app/assets/stylesheets/admin.css
index 06ada5e09..f8866eba3 100644
--- a/spec/example_app/app/assets/stylesheets/admin.css
+++ b/spec/example_app/app/assets/stylesheets/admin.css
@@ -1 +1,3 @@
-//= require_tree ./admin
+/*
+*= require_tree ./admin
+*/