diff --git a/Rakefile b/Rakefile
index 69521cfa7..c9a838ae7 100644
--- a/Rakefile
+++ b/Rakefile
@@ -13,7 +13,7 @@ end
 task :default => "spec:all"
 
 namespace :spec do
-  %w(active_record_edge active_record_40 active_record_41 active_record_32 active_record_31 active_record_30 data_mapper_12 mongoid_31 mongoid_30 mongoid_24 mongo_mapper sinatra_13 sinatra_14).each do |gemfile|
+  %w(active_record_edge active_record_40 active_record_41 active_record_32 active_record_31 active_record_30 data_mapper_12 mongoid_40 mongoid_31 mongoid_30 mongoid_24 mongo_mapper sinatra_13 sinatra_14).each do |gemfile|
     desc "Run Tests against #{gemfile}"
     task gemfile do
       sh "BUNDLE_GEMFILE='gemfiles/#{gemfile}.gemfile' bundle --quiet"
@@ -23,7 +23,7 @@ namespace :spec do
 
   desc "Run Tests against all ORMs"
   task :all do
-    %w(active_record_edge active_record_40 active_record_41 active_record_32 active_record_31 active_record_30 data_mapper_12 mongoid_31 mongoid_30 mongoid_24 mongo_mapper sinatra_13 sinatra_14).each do |gemfile|
+    %w(active_record_edge active_record_40 active_record_41 active_record_32 active_record_31 active_record_30 data_mapper_12 mongoid_40 mongoid_31 mongoid_30 mongoid_24 mongo_mapper sinatra_13 sinatra_14).each do |gemfile|
       sh "BUNDLE_GEMFILE='gemfiles/#{gemfile}.gemfile' bundle --quiet"
       sh "BUNDLE_GEMFILE='gemfiles/#{gemfile}.gemfile' bundle exec rake spec"
     end