diff --git a/contrib/ruby/jasmine_runner.rb b/contrib/ruby/jasmine_runner.rb
index 633c89f6..857bec08 100644
--- a/contrib/ruby/jasmine_runner.rb
+++ b/contrib/ruby/jasmine_runner.rb
@@ -20,14 +20,14 @@ module Jasmine
   end
 
   class RunAdapter
-    def initialize(spec_files)
-      p "spec_files: #{spec_files}"
-
-      @spec_files = spec_files
+    def initialize(spec_files_or_proc)
+      @spec_files_or_proc = spec_files_or_proc
     end
 
     def call(env)
-      spec_files = @spec_files
+      spec_files = @spec_files_or_proc
+      spec_files = spec_files.call if spec_files.respond_to?(:call)
+
       body = ERB.new(File.read(File.join(File.dirname(__FILE__), "run.html"))).result(binding)
       [
         200,
@@ -38,11 +38,11 @@ module Jasmine
   end
 
   class SimpleServer
-    def self.start(port, spec_dir, mappings)
+    def self.start(port, spec_files_or_proc, mappings)
       require 'thin'
 
       config = {
-        '/run.html' => Jasmine::RunAdapter.new(spec_dir)
+        '/run.html' => Jasmine::RunAdapter.new(spec_files_or_proc)
       }
       mappings.each do |from, to|
         config[from] = Rack::File.new(to)
@@ -50,7 +50,6 @@ module Jasmine
 
       app = Rack::URLMap.new(config)
 
-      server_port = Jasmine::find_unused_port
       Thin::Server.start('0.0.0.0', port, app)
     end
   end
diff --git a/contrib/ruby/jasmine_runner_spec.rb b/contrib/ruby/jasmine_runner_spec.rb
new file mode 100644
index 00000000..5a287eed
--- /dev/null
+++ b/contrib/ruby/jasmine_runner_spec.rb
@@ -0,0 +1,51 @@
+require 'spec'
+require 'open-uri'
+require File.dirname(__FILE__) + '/jasmine_runner'
+
+describe Jasmine::SimpleServer do
+  before do
+    @port = Jasmine::find_unused_port
+  end
+  
+  after do
+    Process.kill "TERM", -@jasmine_server_pid if @jasmine_server_pid
+  end
+
+  it "should start and print script tags" do
+    @jasmine_server_pid = fork do
+      Process.setpgrp
+      Jasmine::SimpleServer.start(@port, ["file1", "file2"], {})
+      exit! 0
+    end
+
+    Jasmine::Runner.new(nil, nil, nil).wait_for_listener(@port)
+
+    run_html = open("http://localhost:#{@port}/run.html").read
+    run_html.should =~ /<script src="file1"/
+    run_html.should =~ /<script src="file2"/
+  end
+
+  it "should take a proc that returns a list of spec files" do
+    spec_fileses = [["file1", "file2"], ["file1", "file2", "file3"]]
+    spec_files_proc = lambda do
+      spec_fileses.shift
+    end
+    
+    @jasmine_server_pid = fork do
+      Process.setpgrp
+      Jasmine::SimpleServer.start(@port, spec_files_proc, {})
+      exit! 0
+    end
+
+    Jasmine::Runner.new(nil, nil, nil).wait_for_listener(@port)
+
+    run_html = open("http://localhost:#{@port}/run.html").read
+    run_html.should =~ /<script src="file1"/
+    run_html.should =~ /<script src="file2"/
+
+    run_html = open("http://localhost:#{@port}/run.html").read
+    run_html.should =~ /<script src="file1"/
+    run_html.should =~ /<script src="file2"/
+    run_html.should =~ /<script src="file3"/
+  end
+end
\ No newline at end of file