def METHOD_NAME(self, title):
    post_data = {"title": title, "content": "Some content", "slug": "hello-world"}
    response = self.client.post(
        reverse("wagtailadmin_pages:edit", args=(self.child_page.id,)), post_data
    )
    # Should be redirected to edit page
    self.assertRedirects(
        response, reverse("wagtailadmin_pages:edit", args=(self.child_page.id,))
    )
    # The page should have "has_unpublished_changes" flag set
    child_page_new = SimplePage.objects.get(id=self.child_page.id)
    self.assertTrue(child_page_new.has_unpublished_changes)