Fixed #25746 -- Isolated inlined test models registration.

Thanks to Tim for the review.

1 files changed, 3 insertions, 13 deletions

diff --git a/tests/foreign_object/tests.py b/tests/foreign_object/tests.py
index bcdadc6d6d..f83698175e 100644
--- a/tests/foreign_object/tests.py
+++ b/tests/foreign_object/tests.py
@@ -1,11 +1,11 @@
 import datetime
 from operator import attrgetter
 
-from django.apps.registry import Apps
 from django.core.exceptions import FieldError
 from django.db import models
 from django.db.models.fields.related import ForeignObject
 from django.test import SimpleTestCase, TestCase, skipUnlessDBFeature
+from django.test.utils import isolate_apps
 from django.utils import translation
 
 from .models import (
@@ -410,15 +410,13 @@ class MultiColumnFKTests(TestCase):
 
 class TestModelCheckTests(SimpleTestCase):
 
+    @isolate_apps('foreign_object')
     def test_check_composite_foreign_object(self):
-        test_apps = Apps(['foreign_object'])
-
         class Parent(models.Model):
             a = models.PositiveIntegerField()
             b = models.PositiveIntegerField()
 
             class Meta:
-                apps = test_apps
                 unique_together = (('a', 'b'),)
 
         class Child(models.Model):
@@ -433,21 +431,16 @@ class TestModelCheckTests(SimpleTestCase):
                 related_name='children',
             )
 
-            class Meta:
-                apps = test_apps
-
         self.assertEqual(Child._meta.get_field('parent').check(from_model=Child), [])
 
+    @isolate_apps('foreign_object')
     def test_check_subset_composite_foreign_object(self):
-        test_apps = Apps(['foreign_object'])
-
         class Parent(models.Model):
             a = models.PositiveIntegerField()
             b = models.PositiveIntegerField()
             c = models.PositiveIntegerField()
 
             class Meta:
-                apps = test_apps
                 unique_together = (('a', 'b'),)
 
         class Child(models.Model):
@@ -463,7 +456,4 @@ class TestModelCheckTests(SimpleTestCase):
                 related_name='children',
             )
 
-            class Meta:
-                apps = test_apps
-
         self.assertEqual(Child._meta.get_field('parent').check(from_model=Child), [])