diff --git a/README.md b/README.md
index 6c023c4..116a798 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 # Sinatra Flash
 
-Simple flash hash implementation for Sinatra.
+Simple flash hash implementation for Sinatra. My implementation has slightly
+different behavior than Rails in that it doesn't delete entries until they used.
+I think it's pretty rad, but I'm happy to hear thoughts to the contrary.
 
 ## Usage
 
diff --git a/lib/sinatra-flash.rb b/lib/sinatra-flash.rb
index eb61462..2e71854 100644
--- a/lib/sinatra-flash.rb
+++ b/lib/sinatra-flash.rb
@@ -2,8 +2,8 @@ module Sinatra
   module Flash
     # Implements bracket accessors for storing and retrieving flash entries.
     class FlashHash
-      def initialize(env)
-        @session = env['rack.session']
+      def initialize(session)
+        @session = session
         @session[:__FLASH__] ||= {}
       end
 
@@ -41,7 +41,7 @@ def values
     end
 
     def flash
-      @flash ||= Sinatra::Flash::FlashHash.new(env)
+      @flash ||= Sinatra::Flash::FlashHash.new(session)
     end
   end
 end
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diff --git a/test/helper.rb b/test/helper.rb
new file mode 100644
index 0000000..38ae3c1
--- /dev/null
+++ b/test/helper.rb
@@ -0,0 +1,25 @@
+require 'rubygems'
+require 'sinatra/base'
+require 'bacon'
+require 'sinatra/test'
+require 'sinatra/test/bacon'
+require File.join(File.dirname(__FILE__), *%w[.. lib sinatra-flash])
+
+class String
+  [:green, :yellow, :red].each { |c| define_method(c) { self } }
+end if ENV['TM_RUBY']
+
+# bacon swallows errors alive
+def err_explain
+  begin
+    yield
+  rescue => e
+    puts e.inspect
+    puts e.backtrace
+    raise e
+  end
+end
+
+def mock_app(&block)
+  @app = Sinatra.new(&block)
+end
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diff --git a/test/test_flash.rb b/test/test_flash.rb
new file mode 100644
index 0000000..04d968d
--- /dev/null
+++ b/test/test_flash.rb
@@ -0,0 +1,29 @@
+require File.dirname(__FILE__) + '/helper'
+
+describe 'Sinatra::Flash' do
+  before do
+    mock_app {
+      include Sinatra::Flash
+      
+      set :sessions, false
+      
+      get '/view' do
+        flash[:notice]
+      end
+      
+      post '/set' do
+        flash[:notice] = params[:q]
+        redirect '/view'
+      end
+    }
+  end
+  
+  it 'is empty by default' do
+    err_explain do
+      get '/view'
+      body.should.be.empty
+    end
+  end
+  
+  # Testing sessions is a royal pain in the ass.
+end
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