Issues with Manual Login and Logout in Specs

[albertski]

I have a question regarding the login_as helper. I'm using Rails 6 application with Devise (which uses Warden). I have a spec where I want to test the login page as a real user, so I have a method like this:

  def log_in(user)
    visit '/users/login'
    fill_in 'Email', with: user.email
    fill_in 'Password', with: user.password
    click_button 'Login'
  end

The problem is after I logout and then try to go login again. I get an error that I am already signed in. If I use login_as(user, scope: :user) the issue goes away.

Do we have to use the login_as method for proper sign-in/sign-out functionality in specs, or am I missing something in my manual login approach? (Sorry, if this is a Devise question and not a Warden question)