Rakefile in assignable_values-0.6.1 vs Rakefile in assignable_values-0.7.1

@@ -2,17 +2,28 @@
 require 'bundler/gem_tasks'
 
 desc 'Default: Run all specs.'
 task :default => 'all:spec'
 
+
+namespace :travis_ci do
+
+  desc 'Things to do before Travis CI begins'
+  task :prepare do
+  end
+
+end
+
 namespace :all do
 
   desc "Run specs on all spec apps"
   task :spec do
+    success = true
     for_each_directory_of('spec/**/Rakefile') do |directory|
       env = "SPEC=../../#{ENV['SPEC']} " if ENV['SPEC']
-      system("cd #{directory} && #{env} bundle exec rake spec")
+      success &= system("cd #{directory} && #{env} bundle exec rake spec")
     end
+    fail "Tests failed" unless success
   end
 
   namespace :bundle do
 
     desc "Bundle all spec apps"