Is this possible in controller test?

In my user controller I have a before_action for the new page/method. This before_action includes:

@organization = Organization.friendly.find(params[:id])

In my user fixtures I have an organization: one for user @admin, and in my organizations fixtures I have a record for this organization "one". Still my controller test fails on the above line with the message:

ActiveRecord::RecordNotFound: Couldn't find Organization without an ID

Why is this? Is it not possible to do this in a controller test and should I use an integration test instead? If I can use a controller test (which I here prefer), what is wrong with my code?

---

The controller test:

  test "should get new" do
    log_in_as("user", @admin) # Test helper that functions properly
    get :new                  # It fails here on the before_action defined in the users controller.
    assert_response :success
  end