diff --git a/spec/models/grader_message_spec.rb b/spec/models/grader_message_spec.rb
deleted file mode 100644
--- a/spec/models/grader_message_spec.rb
+++ /dev/null
@@ -1,119 +0,0 @@
-
-require File.dirname(__FILE__) + '/../spec_helper'
-
-describe GraderMessage do
-
-  def add_submission_with_id(id)
-    submission = stub(Submission, :id => id)
-    GraderMessage.create_grade_submission("exam",submission)
-  end
-
-  before(:each) do 
-    GraderMessage.destroy_all
-  end
-
-  it "should return nil when there is no messages to me" do
-    GraderMessage.create_message(1,0)
-    GraderMessage.get_message_for(2).should == nil
-  end
-  
-  it "should return a messages directed to me" do
-    GraderMessage.create_message(1,0)
-    GraderMessage.get_message_for(2).should == nil
-  end
-  
-  it "should return a messages directed to me, in order of creation" do
-    msg1 = GraderMessage.create_message(1,0)
-    msg2 = GraderMessage.create_message(2,2)
-    msg3 = GraderMessage.create_message(1,2)
-    GraderMessage.get_message_for(1).id.should == msg1.id
-    GraderMessage.get_message_for(1).id.should == msg3.id
-  end
-  
-  it "should not return a messages directed to me if the command is not on my list of accepting commands" do
-    msg1 = GraderMessage.create_message(1,GraderMessage::GRADE_SUBMISSION)
-    msg2 = GraderMessage.create_message(1,GraderMessage::STOP)
-    GraderMessage.get_message_for(1,[GraderMessage::GRADE_TEST_REQUEST]).should == nil
-  end
-  
-  it "should return a messages directed to me if the command is on my list of accepting commands" do
-    msg1 = GraderMessage.create_message(1,0)
-    msg2 = GraderMessage.create_message(1,2)
-    msg3 = GraderMessage.create_message(2,2) 
-    GraderMessage.get_message_for(1,[2]).id.should == msg2.id
-    GraderMessage.get_message_for(1,[2]).should == nil
-  end
-  
-  it "should return a message directed to anyone when I'm requesting" do
-    msg1 = GraderMessage.create_message(:any,0)
-    GraderMessage.get_message_for(1).id.should == msg1.id
-  end
-
-  it "should return a messages directed to anyone only if the command is on my list of accepting commands" do
-    msg1 = GraderMessage.create_message(:any,0)
-    GraderMessage.get_message_for(1,[1]).should == nil
-    msg2 = GraderMessage.create_message(:any,1)
-    GraderMessage.get_message_for(1,[1]).id.should == msg2.id
-  end
-
-  it "should return messages directed to anyone to many graders in order of requests" do
-    msg1 = GraderMessage.create_message(:any,0)
-    msg2 = GraderMessage.create_message(:any,2)
-    msg3 = GraderMessage.create_message(:any,2) 
-    GraderMessage.get_message_for(1).id.should == msg1.id
-    GraderMessage.get_message_for(2).id.should == msg2.id
-    GraderMessage.get_message_for(1).id.should == msg3.id
-  end
-  
-  it "should return messages directed to anyone to graders accepting those commands in order of requests" do
-    msg1 = GraderMessage.create_message(:any,0)
-    msg2 = GraderMessage.create_message(:any,1)
-    msg3 = GraderMessage.create_message(:any,2) 
-    msg4 = GraderMessage.create_message(:any,2) 
-    msg5 = GraderMessage.create_message(:any,3) 
-    GraderMessage.get_message_for(1).id.should == msg1.id
-    GraderMessage.get_message_for(2,[2]).id.should == msg3.id
-    GraderMessage.get_message_for(1,[3]).id.should == msg5.id
-    GraderMessage.get_message_for(2).id.should == msg2.id
-    GraderMessage.get_message_for(1).id.should == msg4.id
- end
-
-  it "should get all messages dispatched when there are many concurrent processes" do
-    n = 100
-    msg = []
-    n.times do |i|
-      msg << GraderMessage.create_message(:any,i)
-    end
-
-    #puts "#{n} messages created"
-
-    t = 10  # use 10 threads
-    ths = []
-    t.times do |i|
-      fork do
-        #puts "I'm the #{i+1}-th process."
-        begin
-          m = GraderMessage.get_message_for(i)
-          #puts "#{i+1} got #{m.id}" if m
-          sleep 0.1
-        end while m!=nil
-        #puts "The #{i+1}-th process terminated."
-        exit 0
-      end
-    end
-
-    t.times do
-      Process.wait
-    end
-
-    # for some reason the connection is lost at this point.
-    GraderMessage.connection.reconnect!
-
-    # check that all messages have been processed
-    GraderMessage.find(:all) do |msg|
-      msg.taken_grader_process.should != nil
-    end
-
-  end
-  
-end