diff --git a/test/reline/yamatanooroti/test_rendering.rb b/test/reline/yamatanooroti/test_rendering.rb
index d2e73ca8cb..b17e8bbb01 100644
--- a/test/reline/yamatanooroti/test_rendering.rb
+++ b/test/reline/yamatanooroti/test_rendering.rb
@@ -809,7 +809,7 @@ begin
       EOC
     end
 
-    private def write_inputrc(content)
+    def write_inputrc(content)
       File.open(@inputrc_file, 'w') do |f|
         f.write content
       end