Testing Devise Using capybara rspec and factory girl

i'm new at rails and i'm testing my devise gem User with capybara rspec and factory girl.

Here's spec code:

require 'rails_helper'
RSpec.describe User, type: :request do
  it "displays the user's email after successful login" do
    user = FactoryGirl.create(:user, email: 'test@test.com', password: 'password')
    visit root_url
    fill_in 'Email', with: 'test@test.com'
    fill_in 'Password', with: 'password'
    click_button 'Log in'
    expect page.has_content?('jdoe')
  end
end

The problem is in

expect page.has_content?('jdoe') No matter what i put instead 'jdoe' test works perfectly without any errors.

Here's factory:

FactoryGirl.define do
  factory :user do
    email 'test@test.com'
    password 'password'
    password_confirmation 'password'
  end
end

Maybe I missed something or going with a wrong way. How should I test here?