diff --git a/train.rb b/train.rb
index bc6dbcb..7aa4e0d 100644
--- a/train.rb
+++ b/train.rb
@@ -1,15 +1,26 @@
 class Conductor
+	attr_reader :messageBoard
 
-	attr_reader :engineer
-
-	def initialize(engineer)
-		@engineer = engineer
+	def initialize(messageBoard)
+		@messageBoard = messageBoard
 	end
 
 	def see_danger_coming!
-		engineer.slow_down!
+		messageBoard.slow_down!
 	end
 end
 
 class Engineer
+	attr_reader :messageBoard
+
+	def initialize(messageBoard)
+		@messageBoard = messageBoard
+	end
+
+	def slows_down
+		messageBoard.confirm_slowdown!
+	end
+end
+
+class MessageBoard
 end
\ No newline at end of file
diff --git a/train_spec.rb b/train_spec.rb
index de4cff5..343d1c2 100644
--- a/train_spec.rb
+++ b/train_spec.rb
@@ -1,13 +1,23 @@
 require 'rspec'
+require '../../../spec_helper'
 require './train'
-describe Conductor do
 
-	let(:engineer) { Engineer.new }
-	let(:conductor) { Conductor.new(engineer)}
+describe Conductor do
+	let(:messageBoard) {MessageBoard.new}
+	let(:conductor) {Conductor.new(messageBoard)}
 
-	it "should tell the engineer to slow down" do
-		engineer.should_receive(:slow_down!)
+	it "should tell the messageboard to slowdown" do
+		messageBoard.should_receive(:slow_down!)
 		conductor.see_danger_coming!
 	end
-	
+end
+
+describe Engineer do
+	let(:messageBoard) {MessageBoard.new}
+	let(:engineer) {Engineer.new(messageBoard)}
+
+	it "should tell the messageBoard slowdown was confirmed" do
+		messageBoard.should_receive(:confirm_slowdown!)
+		engineer.slows_down
+	end
 end
\ No newline at end of file
diff --git a/train_test.rb b/train_test.rb
index 3108758..e797660 100644
--- a/train_test.rb
+++ b/train_test.rb
@@ -2,10 +2,10 @@
 require 'minitest/mock'
 require './train'
 
-class ConductorTest < MiniTest::Unit::TestCase
+class ConductorTest < Minitest::Test
 
 	def setup
-		@engineer = MiniTest::Mock.new
+		@engineer = Minitest::Mock.new
 		@conductor = Conductor.new(@engineer)
 	end