Can't quite get this looking cleaner by using "subject" and "specify"

tests.rb

require 'spec_helper'

describe User, ".add_reputation via voting" do
  before(:each) do
    @user = User.new
    @user.reputation.should == 1
  end
 
  it "adds one rep" do
    @user.add_reputation(:voting)
    @user.reputation.should == 2
  end
  
  it "cant add rep more than 10 times per day" do
    vote_twenty_times(@user)
    @user.reputation.should == 11
  end
  
  it "limits rep for voting per day when last vote is a few days back" do
    @user.last_vote_date = 3.days.ago
    @user.last_vote_date.utc < 1.day.ago
    vote_twenty_times(@user)
    @user.reputation.should == 11
  end
  
  it "limits rep per day when last vote is a few days back and has some rep already" do
    @user.last_vote_date = 3.days.ago
    @user.votes_per_day = 5
    @user.reputation = 5
    vote_twenty_times(@user)
    @user.reputation.should == 15
  end
  
  def vote_twenty_times(user)
    20.times do
      user.add_reputation(:voting) 
    end
  end
  
end