diff --git a/rakefile.rb b/rakefile.rb
index e0220ac..42ac875 100644
--- a/rakefile.rb
+++ b/rakefile.rb
@@ -4,8 +4,9 @@ require 'rake'
 require 'rake/clean'
 require 'rake/testtask'
 
+CLEAN.include('test/system/build/' + '*.*')
 
-task :default => [ 'tests:all' ]
+task :default => [ :clobber, 'tests:all' ]
 
 namespace :tests do
 
diff --git a/test/system/config.yml b/test/system/config.yml
new file mode 100644
index 0000000..e69de29