diff --git a/lib/webrat/core/session.rb b/lib/webrat/core/session.rb
index 074ded6..ca1008c 100644
--- a/lib/webrat/core/session.rb
+++ b/lib/webrat/core/session.rb
@@ -29,8 +29,6 @@ module Webrat
       SinatraSession
     when :selenium
       SeleniumSession
-    when :sinatra
-      SinatraSession
     when :mechanize
       MechanizeSession
     else