diff --git a/tests/regressiontests/admin_inlines/models.py b/tests/regressiontests/admin_inlines/models.py
index 5a12e0743c..4e5c4e3ae3 100644
--- a/tests/regressiontests/admin_inlines/models.py
+++ b/tests/regressiontests/admin_inlines/models.py
@@ -123,25 +123,3 @@ class InlineWeakness(admin.TabularInline):
     extra = 1
 
 admin.site.register(Fashionista, inlines=[InlineWeakness])
-
-
-__test__ = {'API_TESTS': """
-
-# Regression test for #9362
-
->>> sally = Teacher.objects.create(name='Sally')
->>> john = Parent.objects.create(name='John')
->>> joe = Child.objects.create(name='Joe', teacher=sally, parent=john)
-
-The problem depends only on InlineAdminForm and its "original" argument, so
-we can safely set the other arguments to None/{}. We just need to check that
-the content_type argument of Child isn't altered by the internals of the
-inline form.
-
->>> from django.contrib.admin.helpers import InlineAdminForm
->>> iaf = InlineAdminForm(None, None, {}, {}, joe)
->>> iaf.original
-<Child: I am Joe, a child of John>
-
-"""
-}
diff --git a/tests/regressiontests/admin_inlines/tests.py b/tests/regressiontests/admin_inlines/tests.py
index c27873ceec..c0c2bb7258 100644
--- a/tests/regressiontests/admin_inlines/tests.py
+++ b/tests/regressiontests/admin_inlines/tests.py
@@ -1,9 +1,13 @@
 from django.test import TestCase
 
+from django.contrib.admin.helpers import InlineAdminForm
+from django.contrib.contenttypes.models import ContentType
 # local test models
 from models import Holder, Inner, InnerInline
 from models import Holder2, Inner2, Holder3, Inner3
 from models import Person, OutfitItem, Fashionista
+from models import Teacher, Parent, Child
+
 
 class TestInline(TestCase):
     fixtures = ['admin-views-users.xml']
@@ -100,3 +104,20 @@ class TestInlineMedia(TestCase):
         response = self.client.get(change_url)
         self.assertContains(response, 'my_awesome_admin_scripts.js')
         self.assertContains(response, 'my_awesome_inline_scripts.js')
+
+class TestInlineAdminForm(TestCase):
+
+    def test_immutable_content_type(self):
+        """Regression for #9362
+        The problem depends only on InlineAdminForm and its "original"
+        argument, so we can safely set the other arguments to None/{}. We just
+        need to check that the content_type argument of Child isn't altered by
+        the internals of the inline form."""
+
+        sally = Teacher.objects.create(name='Sally')
+        john = Parent.objects.create(name='John')
+        joe = Child.objects.create(name='Joe', teacher=sally, parent=john)
+
+        iaf = InlineAdminForm(None, None, {}, {}, joe)
+        parent_ct = ContentType.objects.get_for_model(Parent)
+        self.assertEqual(iaf.original.content_type, parent_ct)