Applied ignore_warnings to Django tests

tests/aggregation/tests.py

@@ -3,7 +3,6 @@ from __future__ import unicode_literals
 import datetime
 from decimal import Decimal
 import re
-import warnings
 
 from django.core.exceptions import FieldError
 from django.db import connection
@@ -11,10 +10,7 @@ from django.db.models import (
     Avg, Sum, Count, Max, Min,
     Aggregate, F, Value, Func,
     IntegerField, FloatField, DecimalField)
-with warnings.catch_warnings(record=True) as w:
-    warnings.simplefilter("always")
-    from django.db.models.sql import aggregates as sql_aggregates
-from django.test import TestCase
+from django.test import TestCase, ignore_warnings
 from django.test.utils import Approximate
 from django.test.utils import CaptureQueriesContext
 from django.utils import six, timezone
@@ -950,7 +946,9 @@ class ComplexAggregateTestCase(TestCase):
         self.assertQuerysetEqual(
             qs2, [1, 2], lambda v: v.pk)
 
+    @ignore_warnings(category=RemovedInDjango20Warning)
     def test_backwards_compatibility(self):
+        from django.db.models.sql import aggregates as sql_aggregates
 
         class SqlNewSum(sql_aggregates.Aggregate):
             sql_function = 'SUM'
@@ -964,8 +962,6 @@ class ComplexAggregateTestCase(TestCase):
                     col, source=source, is_summary=is_summary, **self.extra)
                 query.annotations[alias] = aggregate
 
-        with warnings.catch_warnings():
-            warnings.simplefilter("ignore", RemovedInDjango20Warning)
-            qs = Author.objects.values('name').annotate(another_age=NewSum('age') + F('age'))
-            a = qs.get(pk=1)
-            self.assertEqual(a['another_age'], 68)
+        qs = Author.objects.values('name').annotate(another_age=NewSum('age') + F('age'))
+        a = qs.get(pk=1)
+        self.assertEqual(a['another_age'], 68)