[1.11.x] Refs #27790 -- Reverted "Removed available_apps on TestCase subclasses."

This reverts commit 91023d79ec70df9289271e63a67675ee51e7dea8 as it
increases memory usage for the test suite.

Backport of 7d50d2bcb8a3cf3fea727174717ead7e6508e9e2 from master

2 files changed, 13 insertions, 0 deletions

diff --git a/tests/multiple_database/tests.py b/tests/multiple_database/tests.py
index 0ea3b6667e..25483d5bdf 100644
--- a/tests/multiple_database/tests.py
+++ b/tests/multiple_database/tests.py
@@ -1794,6 +1794,12 @@ class SyncOnlyDefaultDatabaseRouter(object):
 
 class MigrateTestCase(TestCase):
 
+    # Limit memory usage when calling 'migrate'.
+    available_apps = [
+        'multiple_database',
+        'django.contrib.auth',
+        'django.contrib.contenttypes'
+    ]
     multi_db = True
 
     def test_migrate_to_other_database(self):
diff --git a/tests/swappable_models/tests.py b/tests/swappable_models/tests.py
index 548c7b3286..06aa373d9a 100644
--- a/tests/swappable_models/tests.py
+++ b/tests/swappable_models/tests.py
@@ -11,6 +11,13 @@ from django.utils.six import StringIO
 
 class SwappableModelTests(TestCase):
 
+    # Limit memory usage when calling 'migrate'.
+    available_apps = [
+        'swappable_models',
+        'django.contrib.auth',
+        'django.contrib.contenttypes',
+    ]
+
     @override_settings(TEST_ARTICLE_MODEL='swappable_models.AlternateArticle')
     def test_generated_data(self):
         "Permissions and content types are not created for a swapped model"