def METHOD_NAME(email_mock):
    form = forms.SubscribeForm(
        {"newsletters": ["dude, walter"], "email": "dude@example.com"},
    )
    form.fields["newsletters"].choices = (("dude", "dude"),)
    assert not form.is_valid()
    assert "privacy" in form.errors
    form = forms.SubscribeForm(
        {
            "newsletters": ["dude, walter"],
            "email": "dude@example.com",
            "privacy": "false",
        },
    )
    form.fields["newsletters"].choices = (("dude", "dude"),)
    assert not form.is_valid()
    assert "privacy" in form.errors