Cant get passed the initial edit spec test

require 'spec_helper'

describe "Editing todo lists" do 
    it "updates a todo list successfully with correct information" do
        todo_lists = TodoList.create(title: "Groceries", description: "Grocery List")

        visit "/todo_lists"
        within "#todo_list_#{todo_list.id}" do
        click_link "Edit"

        end

        fill_in "Title", with: "New title"
        fill_in "Description", with: "New description"
        click_button "Update Todo_list"

        expect(page).to have_content("Todo list was successfully updated.")
        expect(todo_list.title).to eq("New title")
        expect(todo_list.description).to eq("New description")

    end

end

Failures:

  1) Editing todo lists updates a todo list successfully with correct information
     Failure/Error: within "#todo_list_#{todo_list.id}" do
     NameError:
       undefined local variable or method `todo_list' for #<RSpec::Core::ExampleGroup::Nested_1:0xb908d2ac>
     # ./spec/features/todo_lists/edit_spec.rb:8:in `block (2 levels) in <top (required)>'

Here is the my index.html.erb