gistfile1.diff

diff --git a/lib/riot/context.rb b/lib/riot/context.rb
index a1231d7..8532ccd 100644
--- a/lib/riot/context.rb
+++ b/lib/riot/context.rb
@@ -20,7 +20,7 @@ module Riot
     def asserts_topic; asserts("topic") { topic }; end
 
     def context(description, &definition)
-      @contexts << Context.new("#{@description} #{description}", self, &definition)
+      @contexts << self.class.new("#{@description} #{description}", self, &definition)
     end
     
     def run(reporter)