Applied ignore_warnings to Django tests

tests/admin_checks/tests.py

@@ -1,14 +1,11 @@
 from __future__ import unicode_literals
 
-import warnings
-
 from django import forms
 from django.contrib import admin
 from django.contrib.contenttypes.admin import GenericStackedInline
 from django.core import checks
 from django.core.exceptions import ImproperlyConfigured
-from django.test import TestCase
-from django.test.utils import override_settings
+from django.test import TestCase, ignore_warnings, override_settings
 
 from .models import Song, Book, Album, TwoAlbumFKAndAnE, City, State, Influence
 
@@ -589,6 +586,7 @@ class SystemChecksTestCase(TestCase):
         errors = FieldsOnFormOnlyAdmin.check(model=Song)
         self.assertEqual(errors, [])
 
+    @ignore_warnings(module='django.contrib.admin.options')
     def test_validator_compatibility(self):
         class MyValidator(object):
             def validate(self, cls, model):
@@ -597,18 +595,16 @@ class SystemChecksTestCase(TestCase):
         class MyModelAdmin(admin.ModelAdmin):
             validator_class = MyValidator
 
-        with warnings.catch_warnings(record=True):
-            warnings.filterwarnings('ignore', module='django.contrib.admin.options')
-            errors = MyModelAdmin.check(model=Song)
+        errors = MyModelAdmin.check(model=Song)
 
-            expected = [
-                checks.Error(
-                    'error!',
-                    hint=None,
-                    obj=MyModelAdmin,
-                )
-            ]
-            self.assertEqual(errors, expected)
+        expected = [
+            checks.Error(
+                'error!',
+                hint=None,
+                obj=MyModelAdmin,
+            )
+        ]
+        self.assertEqual(errors, expected)
 
     def test_check_sublists_for_duplicates(self):
         class MyModelAdmin(admin.ModelAdmin):