Refs #18682 -- Edited explanation in stale content type deletion.

Follow up to 8db889eaf7dce0cb715b075be32047c1b1b316da.

2 files changed, 12 insertions, 5 deletions

diff --git a/tests/contenttypes_tests/models.py b/tests/contenttypes_tests/models.py
index 4b9d3d31e6..fe1854e8a3 100644
--- a/tests/contenttypes_tests/models.py
+++ b/tests/contenttypes_tests/models.py
@@ -131,6 +131,7 @@ class Post(models.Model):
 class ModelWithNullFKToSite(models.Model):
     title = models.CharField(max_length=200)
     site = models.ForeignKey(Site, null=True, on_delete=models.CASCADE)
+    post = models.ForeignKey(Post, null=True, on_delete=models.CASCADE)
 
     def __str__(self):
         return self.title
diff --git a/tests/contenttypes_tests/tests.py b/tests/contenttypes_tests/tests.py
index 5c8c675a4a..6d57a23355 100644
--- a/tests/contenttypes_tests/tests.py
+++ b/tests/contenttypes_tests/tests.py
@@ -389,21 +389,27 @@ class UpdateContentTypesTests(TestCase):
     def test_interactive_true_with_dependent_objects(self):
         """
         interactive mode of update_contenttypes() (the default) should delete
-        stale contenttypes and warn of dependent objects
+        stale contenttypes and warn of dependent objects.
         """
-        Post.objects.create(title='post', content_type=self.content_type)
+        post = Post.objects.create(title='post', content_type=self.content_type)
+        # A related object is needed to show that a custom collector with
+        # can_fast_delete=False is needed.
+        ModelWithNullFKToSite.objects.create(post=post)
         contenttypes_management.input = lambda x: force_str("yes")
         with captured_stdout() as stdout:
             contenttypes_management.update_contenttypes(self.app_config)
         self.assertEqual(Post.objects.count(), 0)
-        self.assertIn("1 object of type contenttypes_tests.post:", stdout.getvalue())
-        self.assertIn("Deleting stale content type", stdout.getvalue())
+        output = stdout.getvalue()
+        self.assertIn('- Content type for contenttypes_tests.Fake', output)
+        self.assertIn('- 1 contenttypes_tests.Post object(s)', output)
+        self.assertIn('- 1 contenttypes_tests.ModelWithNullFKToSite', output)
+        self.assertIn('Deleting stale content type', output)
         self.assertEqual(ContentType.objects.count(), self.before_count)
 
     def test_interactive_true_without_dependent_objects(self):
         """
         interactive mode of update_contenttypes() (the default) should delete
-        stale contenttypes and inform there are no dependent objects
+        stale contenttypes even if there aren't any dependent objects.
         """
         contenttypes_management.input = lambda x: force_str("yes")
         with captured_stdout() as stdout: