def METHOD_NAME(self):
    # created an open suggestion from another user
    DuplicateSuggestion.objects.create(
        person=self.person,
        other_person=self.other_person,
        user=self.user_who_can_merge,
        status=DuplicateSuggestion.SUGGESTED,
    )
    assert DuplicateSuggestion.objects.count() == 1
    url = reverse(
        viewname="person-duplicate", kwargs={"person_id": self.person.pk}
    )
    url = f"{url}?other_person={self.other_person.pk}"
    response = self.app.get(url, user=self.user)
    self.assertContains(
        response, "A suggestion between these people is already open"
    )