generators/datamapper_install/templates/datamapper.rake in datamapper4rails-0.3.0 vs generators/datamapper_install/templates/datamapper.rake in datamapper4rails-0.3.1

@@ -44,11 +44,13 @@
     ::DataMapper.auto_upgrade!
   end
 
   # this is needed for rspec and test tasks  
   namespace :test do
-    RAILS_ENV = 'test'
-    task :prepare => :automigrate
+    task :prepare do
+      RAILS_ENV='test'
+      Rake::Task['db:automigrate'].invoke
+    end
   end
 
   namespace :migrate do
     task :load => :environment do
       require 'dm-migrations/migration_runner'