```ruby
RSpec.feature 'Home page' do
  scenario 'visit the home page' do
    visit root_path
    expect(page).to have_content 'Hello, world!'
  end
end
```

Include 'rails_helper' in home page spec
user
```ruby
require 'rails_helper'

RSpec.feature 'Home page' do
  scenario 'visit the home page' do
    visit root_path
    expect(page).to have_content 'Hello, world!'
  end
end
```
assistant