diff --git a/sinatra-contrib/Rakefile b/sinatra-contrib/Rakefile
index b3d2a76b..1bc6e7d9 100644
--- a/sinatra-contrib/Rakefile
+++ b/sinatra-contrib/Rakefile
@@ -4,7 +4,7 @@ require 'yaml'
 require 'sinatra/contrib/version'
 
 desc "run specs"
-task(:spec) { ruby '-S rspec spec -c' }
+task(:spec) { ruby '-S rspec spec -cw' }
 task(:test => :spec)
 task(:default => :spec)