Minimize annoying warnings

lib/sidekiq/testing.rb

@@ -1,6 +1,7 @@
 module Sidekiq
   module Worker
     module ClassMethods
+      alias_method :perform_async_old, :perform_async
       def perform_async(*args)
         self.new.perform(*args)
       end

test/test_manager.rb

@@ -31,7 +31,6 @@ class TestManager < MiniTest::Unit::TestCase
       Sidekiq::Client.push(:foo, 'class' => IntegrationWorker, 'args' => [1, 2])
 
       q = TimedQueue.new
-      redis = Sidekiq::RedisConnection.create(:url => 'redis://localhost/sidekiq_test')
       mgr = Sidekiq::Manager.new(@redis, :queues => [:foo], :processor_count => 2)
       mgr.when_done do |_|
         q << 'done' if $processed == 2

test/test_testing.rb

@@ -14,11 +14,15 @@ class TestTesting < MiniTest::Unit::TestCase
     it 'calls the worker directly when in testing mode' do
       begin
         # Override Sidekiq::Worker
-        load 'sidekiq/testing.rb'
+        require 'sidekiq/testing'
         assert_equal 3, DirectWorker.perform_async(1, 2)
       ensure
         # Undo override
-        load 'sidekiq/worker.rb'
+        Sidekiq::Worker::ClassMethods.class_eval do
+          remove_method :perform_async
+          alias_method :perform_async, :perform_async_old
+          remove_method :perform_async_old
+        end
       end
     end