rails rspec capybara testing Capybara::ElementNotFound:Unable to find field "title"

No idea why is it doing so the otherone passed this doesent

require 'spec_helper'

feature "Editing tickets" do
    let!(:project) {FactoryGirl.create(:project)}
    let!(:ticket) {FactoryGirl.create(:ticket, project: project)}

    before do
        visit '/'
        click_link project.name
        click_link ticket.title
        click_link "Edit Ticket"
    end

    scenario "Updating a ticket" do
        fill_in "Title", with: "Make it really shiny!"
        click_button "Update Ticket"

        expect(page).to have_content "Ticket has been updated."

        within("#ticket h2") do
            expect(page).to have_content("Make it really shiny!")
        end

        expect(page).to_not have_content ticket.title
    end

    scenario "Updating a ticket with invalid information" do
        fill_in "Title", with: ""
        click_button "Update Ticket"

        expect(page).to have_content("Ticket has not been updated.")
    end
end

_form.html.erb

<%= form_for [@project, @ticket] do |f| %>
<% if @ticket.errors.any? %>
    <div id="error_explanation">
        <h2><%= pluralize(@ticket.errors.count, "error") %>
            prohibited this ticket from being saved.</h2>

            <ul>
                <% @ticket.errors.full_messages.each do |msg| %>
                <li><%= msg %></li>
                <% end %>
            </ul>
        </div>
        <% end %>

    <p>
        <%= f.label :title , "Title" %><br />
        <%= f.text_field :title %>
    </p>
    <p>
    <%= f.label :description, "Description" %><br />
    <%= f.text_area :description %>
    </p>
    <%= f.submit %>
    <% end %>

Ticket's controller

class TicketsController < ApplicationController
    before_action :set_project
    before_action :set_ticket, only: [:show, :edit, :update, :destroy]

    def new
        @ticket = @project.tickets.build
    end

    def create
        @ticket = @project.tickets.build(ticket_params)
        if @ticket.save
            flash[:notice] = "Ticket has been created."
            redirect_to [@project, @ticket]
        else
            flash[:alert] = "Ticket has not been created."
            render 'new'
        end
    end

    private

    def ticket_params
        params.require(:ticket).permit(:title, :description)
    end

    private

    def set_project
        @project = Project.find(params[:project_id])
    end

    private

    def set_ticket
        @ticket = @project.tickets.find(params[:id])
    end
end

And the error is

1) Editing tickets Updating a ticket Failure/Error: fill_in "title", with: "Make it really shiny!" Capybara::ElementNotFound: Unable to find field "title" # ./spec/features/editing_tickets_spec.rb:16:in `block (2 levels) in '

2) Editing tickets Updating a ticket with invalid information Failure/Error: fill_in "Title", with: "" Capybara::ElementNotFound: Unable to find field "Title" # ./spec/features/editing_tickets_spec.rb:29:in `block (2 levels) in '