Don't load test related tasks in other env

lib/tasks/test.rake

@@ -1,4 +1,5 @@
 begin  
+  if Rails.env.test? || Rails.env.development?
     require 'rspec/core/rake_task'
     require 'open3'
 
@@ -40,6 +41,7 @@ begin
         `kill #{pid}`
       end
     end
+  end
 rescue LoadError => e
   puts e # rspec gem not loaded, probably we are in production machine
 end