diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index fd3e1369..3a3410c4 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -41,7 +41,7 @@ module ParserHelper
   end
 
   def parse(string)
-    Parser::CurrentRuby.parse(string)
+    Unparser::Preprocessor.run(Parser::CurrentRuby.parse(string))
   end
 end