def METHOD_NAME(self):
    data = {
        "name": "往事",
        "email": "test@example.org",
    }
    form = forms.OrganizationSignupForm(data, user=self.user)
    self.assertFalse(form.is_valid())
    self.assertEqual(
        "Invalid organization name: no slug generated", form.errors["name"][0]
    )