diff --git a/test/integration/app.rb b/test/integration/app.rb
new file mode 100644
index 0000000000..beefd7bef6
--- /dev/null
+++ b/test/integration/app.rb
@@ -0,0 +1,62 @@
+$stderr.puts "loading"
+require 'sinatra'
+
+configure do
+  set :foo, :bar
+end
+
+get '/app_file' do
+  content_type :txt
+  settings.app_file
+end
+
+get '/ping' do
+  'pong'
+end
+
+get '/stream' do
+  stream do |out|
+    sleep 0.1
+    out << "a"
+    sleep 1.2
+    out << "b"
+  end
+end
+
+get '/mainonly' do
+  object = Object.new
+  begin
+    object.send(:get, '/foo') { }
+    'false'
+  rescue NameError
+    'true'
+  end
+end
+
+set :out, nil
+get '/async' do
+  stream(:keep_open) { |o| (settings.out = o) << "hi!" }
+end
+
+get '/send' do
+  settings.out << params[:msg] if params[:msg]
+  settings.out.close if params[:close]
+  "ok"
+end
+
+class Subclass < Sinatra::Base
+  set :out, nil
+  get '/subclass/async' do
+    stream(:keep_open) { |o| (settings.out = o) << "hi!" }
+  end
+
+  get '/subclass/send' do
+    settings.out << params[:msg] if params[:msg]
+    settings.out.close if params[:close]
+    "ok"
+  end
+end
+
+use Subclass
+
+$stderr.puts "starting"
diff --git a/test/integration_helper.rb b/test/integration_helper.rb
new file mode 100644
index 0000000000..06acf53f29
--- /dev/null
+++ b/test/integration_helper.rb
@@ -0,0 +1,208 @@
+require 'sinatra/base'
+require 'rbconfig'
+require 'open-uri'
+require 'net/http'
+
+module IntegrationHelper
+  class BaseServer
+    extend Enumerable
+    attr_accessor :server, :port, :pipe
+    alias name server
+
+    def self.all
+      @all ||= []
+    end
+
+    def self.each(&block)
+      all.each(&block)
+    end
+
+    def self.run(server, port)
+      new(server, port).run
+    end
+
+    def app_file
+      File.expand_path('../integration/app.rb', __FILE__)
+    end
+
+    def environment
+      "development"
+    end
+
+    def initialize(server, port)
+      @installed, @pipe, @server, @port = nil, nil, server, port
+      Server.all << self
+    end
+
+    def run
+      return unless installed?
+      kill
+      @log     = ""
+      @pipe    = IO.popen(command)
+      @started = Time.now
+      warn "#{server} up and running on port #{port}" if ping
+      at_exit { kill }
+    end
+
+    def expect(str)
+      return if log.size < str.size or log[0, str.size] == str
+      raise "Server did not start properly:\n\n#{log}"
+    end
+
+    def ping(timeout = 30)
+      loop do
+        return if alive?
+        if Time.now - @started > timeout
+          $stderr.puts command, log
+          fail "timeout"
+        else
+          expect "loading"
+          sleep 0.1
+        end
+      end
+    end
+
+    def alive?
+      3.times { get('/ping') }
+      true
+    rescue Errno::ECONNREFUSED, Errno::ECONNRESET, EOFError, SystemCallError, OpenURI::HTTPError => error
+      false
+    end
+
+    def get_stream(url = "/stream", &block)
+      Net::HTTP.start '127.0.0.1', port do |http|
+        request = Net::HTTP::Get.new url
+        http.request request do |response|
+          response.read_body(&block)
+        end
+      end
+    end
+
+    def get(url)
+      open("http://127.0.0.1:#{port}#{url}").read
+    end
+
+    def log
+      @log ||= ""
+      loop { @log <<  @pipe.read_nonblock(1) }
+    rescue Exception
+      @log
+    end
+
+    def installed?
+      return @installed unless @installed.nil?
+      require server
+      @installed = true
+    rescue LoadError
+      warn "#{server} is not installed, skipping integration tests"
+      @installed = false
+    end
+
+    def command
+      @command ||= begin
+        cmd = ["RACK_ENV=#{environment}", "exec"]
+        if RbConfig.respond_to? :ruby
+          cmd << RbConfig.ruby.inspect
+        else
+          file, dir = RbConfig::CONFIG.values_at('ruby_install_name', 'bindir')
+          cmd << File.expand_path(file, dir).inspect
+        end
+        cmd << "-I" << File.expand_path('../../lib', __FILE__).inspect
+        cmd << app_file.inspect << '-s' << server << '-o' << '127.0.0.1' << '-p' << port
+        cmd << "-e" << environment.to_s << '2>&1'
+        cmd.join " "
+      end
+    end
+
+    def kill
+      return unless pipe
+      Process.kill("KILL", pipe.pid)
+    rescue NotImplementedError
+      system "kill -9 #{pipe.pid}"
+    rescue Errno::ESRCH
+    end
+
+    def webrick?
+      name.to_s == "webrick"
+    end
+  end
+
+  if RUBY_ENGINE == "jruby"
+    class JRubyServer < BaseServer
+      def start_vm
+        require 'java'
+        # Create a new container, set load paths and env
+        # SINGLETHREAD means create a new runtime
+        vm = org.jruby.embed.ScriptingContainer.new(org.jruby.embed.LocalContextScope::SINGLETHREAD)
+        vm.load_paths = [File.expand_path('../../lib', __FILE__)]
+        vm.environment = ENV.merge('RACK_ENV' => environment.to_s)
+
+        # This ensures processing of RUBYOPT which activates Bundler
+        vm.provider.ruby_instance_config.process_arguments []
+        vm.argv = ['-s', server.to_s, '-o', '127.0.0.1', '-p', port.to_s, '-e', environment.to_s]
+
+        # Set stdout/stderr so we can retrieve log
+        @pipe = java.io.ByteArrayOutputStream.new
+        vm.output = java.io.PrintStream.new(@pipe)
+        vm.error  = java.io.PrintStream.new(@pipe)
+
+        Thread.new do
+          # Hack to ensure that Kernel#caller has the same info as
+          # when run from command-line, for Sintra::Application.app_file.
+          # Also, line numbers are zero-based in JRuby's parser
+          vm.provider.runtime.current_context.set_file_and_line(app_file, 0)
+          # Run the app
+          vm.run_scriptlet org.jruby.embed.PathType::ABSOLUTE, app_file
+          # terminate launches at_exit hooks which start server
+          vm.terminate
+        end
+      end
+
+      def run
+        return unless installed?
+        kill
+        @thread  = start_vm
+        @started = Time.now
+        warn "#{server} up and running on port #{port}" if ping
+        at_exit { kill }
+      end
+
+      def log
+        String.from_java_bytes @pipe.to_byte_array
+      end
+
+      def kill
+        @thread.kill if @thread
+        @thread = nil
+      end
+    end
+    Server = JRubyServer
+  else
+    Server = BaseServer
+  end
+
+  def it(message, &block)
+    Server.each do |server|
+      next unless server.installed?
+      super "with #{server.name}: #{message}" do
+        self.server = server
+        server.run unless server.alive?
+        begin
+          instance_eval(&block)
+        rescue Exception => error
+          server.kill
+          raise error
+        end
+      end
+    end
+  end
+
+  def self.extend_object(obj)
+    super
+
+    base_port = 5000 + Process.pid % 100
+    Sinatra::Base.server.each_with_index do |server, index|
+      Server.run(server, 5000+index)
+    end
+  end
+end
diff --git a/test/integration_test.rb b/test/integration_test.rb
new file mode 100644
index 0000000000..1b482d486b
--- /dev/null
+++ b/test/integration_test.rb
@@ -0,0 +1,31 @@
+require File.expand_path('../helper', __FILE__)
+require File.expand_path('../integration_helper', __FILE__)
+require 'timeout'
+
+# These tests start a real server and talk to it over TCP.
+# Every test runs with every detected server.
+#
+# See test/integration/app.rb for the code of the app we test against.
+class IntegrationTest < Test::Unit::TestCase
+  extend IntegrationHelper
+  attr_accessor :server
+
+  it('sets the app_file') { assert_equal server.app_file, server.get("/app_file") }
+
+  it 'logs once in development mode' do
+    random = "%064x" % Kernel.rand(2**256-1)
+    server.get "/ping?x=#{random}"
+    count = server.log.scan("GET /ping?x=#{random}").count
+    server.webrick? ? assert(count > 0) : assert_equal(1, count)
+  end
+
+  it 'starts the correct server' do
+    exp = %r{
+      ==\sSinatra/#{Sinatra::VERSION}\s
+      has\staken\sthe\sstage\son\s\d+\sfor\sdevelopment\s
+      with\sbackup\sfrom\s#{server}
+    }ix
+
+    assert_match exp, server.log
+  end
+end
\ No newline at end of file