Says unitialized constant Todolist but cant work out how to intialize it. Any help?

Here is the terminal

kerns-mbp:odot Kern$ bin/rspec spec/features/todo_lists/create_spec.rb [deprecated] I18n.enforce_available_locales will default to true in the future. If you really want to skip validation of your locale you can set I18n.enforce_available_locales = false to avoid this message. .F

Failures:

1) Creating todo lists displays an error when the todo list has no title Failure/Error: expect(Todolist.count).to eq(0) NameError: uninitialized constant Todolist # ./spec/features/todo_lists/create_spec.rb:20:in `block (2 levels) in <top (required)>'

Finished in 0.08714 seconds 2 examples, 1 failure

Failed examples:

rspec ./spec/features/todo_lists/create_spec.rb:19 # Creating todo lists displays an error when the todo list has no title

Here is my create_spec.rb file

require 'spec_helper'

describe "Creating todo lists" do it "redirects to the todo list index page on success" do visit "/todo_lists" click_link "New Todo list" expect(page).to have_content("New todo_list")

    fill_in "Title", with: "My todo list"
    fill_in "Description", with:"This is what i am doing today"
    click_button "Create Todo list"



    expect(page).to have_content("My todo list")    
    end

    it "displays an error when the todo list has no title" do
        expect(Todolist.count).to eq(0)

        visit "/todo_lists"
        click_link "New Todo list"
        expect(page).to have_content("New todo_list")

        fill_in "Title", with: ""
        fill_in "Description", with: "This is what i am doing today"
        click_button "Create Todo list"

        expect(page).to have_content("error")
        expect(Todolist.count).to eq(0)

        visit "/todo_lists"
        expect(page).to_not have_content("This is what I'm doing today.")
    end

end

here is my todo_list.rb file

class TodoList < ActiveRecord::Base validates :title, presence: true end