[1.5.x] Fixed #20681 -- Prevented teardown_databases from attempting to tear down aliases

Thanks simonpercivall.

Backport of d9c580306c from master

1 files changed, 3 insertions, 1 deletions

diff --git a/django/test/simple.py b/django/test/simple.py
index e062f5e1e8..24471ca76e 100644
--- a/django/test/simple.py
+++ b/django/test/simple.py
@@ -310,12 +310,14 @@ class DjangoTestSuiteRunner(object):
 
             for alias in aliases:
                 connection = connections[alias]
-                old_names.append((connection, db_name, True))
                 if test_db_name is None:
                     test_db_name = connection.creation.create_test_db(
                             self.verbosity, autoclobber=not self.interactive)
+                    destroy = True
                 else:
                     connection.settings_dict['NAME'] = test_db_name
+                    destroy = False
+                old_names.append((connection, db_name, destroy))
 
         for alias, mirror_alias in mirrored_aliases.items():
             mirrors.append((alias, connections[alias].settings_dict['NAME']))