diff --git a/Rakefile b/Rakefile
index 6aed2d4c1ae..a3affad8345 100644
--- a/Rakefile
+++ b/Rakefile
@@ -2,6 +2,7 @@ require 'rake'
 require 'rubygems/package_task'
 require 'thor/group'
 require File.expand_path('../lib/generators/spree/install/install_generator', __FILE__)
+require 'spree/core/testing_support/common_rake'
 
 spec = eval(File.read('spree.gemspec'))
 Gem::PackageTask.new(spec) do |pkg|
@@ -21,6 +22,15 @@ def run_all_tests(database_name)
   #end
 end
 
+desc "Generates a dummy app for testing for every Spree engine"
+task :test_app do
+  %w(api auth core dash promo).each do |engine|
+    ENV['LIB_NAME'] = File.join('spree', engine)
+    ENV['DUMMY_PATH'] = File.expand_path("../#{engine}/spec/dummy", __FILE__)
+    Rake::Task['common:test_app'].execute
+  end
+end
+
 task :default => :all_tests
 
 desc "Run all tests for sqlite3 only"
diff --git a/core/lib/generators/spree/dummy/dummy_generator.rb b/core/lib/generators/spree/dummy/dummy_generator.rb
index db377ac7edb..cf215bb850d 100644
--- a/core/lib/generators/spree/dummy/dummy_generator.rb
+++ b/core/lib/generators/spree/dummy/dummy_generator.rb
@@ -67,7 +67,7 @@ def cucumber_environment
 
     protected
     def dummy_path
-      'spec/dummy'
+      ENV['DUMMY_PATH'] || 'spec/dummy'
     end
 
     def module_name
diff --git a/core/lib/spree/core/testing_support/common_rake.rb b/core/lib/spree/core/testing_support/common_rake.rb
index 6ff768a45af..c01bb8a6d30 100644
--- a/core/lib/spree/core/testing_support/common_rake.rb
+++ b/core/lib/spree/core/testing_support/common_rake.rb
@@ -1,4 +1,6 @@
-require '../lib/generators/spree/install/install_generator'
+unless defined?(Spree::InstallGenerator)
+  require '../lib/generators/spree/install/install_generator'
+end
 
 desc "Generates a dummy app for testing"
 namespace :common do
diff --git a/core/lib/tasks/core.rake b/core/lib/tasks/core.rake
index 1ce4fa97c3f..0c74999bda5 100644
--- a/core/lib/tasks/core.rake
+++ b/core/lib/tasks/core.rake
@@ -2,7 +2,7 @@ require 'active_record'
 require 'spree/core/custom_fixtures'
 
 namespace :db do
-  desc %q{Loads a specified fixture file: 
+  desc %q{Loads a specified fixture file:
 For .yml/.csv use rake db:load_file[spree/filename.yml, /absolute/path/to/parent/]
 For .rb       use rake db:load_file[/absolute/path/to/sample/filename.rb]}
 
@@ -12,11 +12,9 @@ For .rb       use rake db:load_file[/absolute/path/to/sample/filename.rb]}
     if %w{.csv .yml}.include? file.extname
       puts "loading fixture #{Pathname.new(args.dir).join(file)}"
       Spree::Core::Fixtures.create_fixtures(args.dir, file.to_s.sub(file.extname, ""))
-    else
-      if file.exist?
-        puts "loading ruby #{file}"
-        require file
-      end
+    elsif file.exist?
+      puts "loading ruby #{file}"
+      require file
     end
   end