Testing LiveView with different Locales

Hi,

I am trying to test a registration form where I’d like to capture the user’s locale. I can test my code manually and this works fine, but I cannot figure out how to change the locale in a test.

      Gettext.with_locale(MyApp.Gettext, "de", fn ->
          {:ok, lv, _html} = live(conn, ~p"/register")
          [INSERT OTHER TEST CODE HERE]
      end)

I also tried Gettext.put_locale(MyApp.Gettext, "de") and setting the locale on conn via conn = Plug.Conn.put_session(conn, :locale, "de").

What am I missing? Any other ways to get this done?

Background on capturing locale: I put MyApp.get_locale(PetalProWeb.Gettext) in a @locale and capture it via a hidden field in the registration form.

Thanks in advance!