diff --git a/django/contrib/gis/db/backend/postgis/creation.py b/django/contrib/gis/db/backend/postgis/creation.py
index a53ec71d400..113416de382 100644
--- a/django/contrib/gis/db/backend/postgis/creation.py
+++ b/django/contrib/gis/db/backend/postgis/creation.py
@@ -140,7 +140,10 @@ def create_spatial_db(test=False, verbosity=1, autoclobber=False, interactive=Fa
     # Closing the connection
     connection.close()
     settings.DATABASE_NAME = db_name
-    settings.DATABASE_SUPPORTS_TRANSACTIONS = connection.creation._rollback_works()
+    connection.settings_dict["DATABASE_NAME"] = db_name
+    can_rollback = connection.creation._rollback_works()
+    settings.DATABASE_SUPPORTS_TRANSACTIONS = can_rollback
+    connection.settings_dict["DATABASE_SUPPORTS_TRANSACTIONS"] = can_rollback
 
     # Syncing the database
     call_command('syncdb', verbosity=verbosity, interactive=interactive)
diff --git a/django/db/backends/creation.py b/django/db/backends/creation.py
index c48cad6a7d5..b338a342ef3 100644
--- a/django/db/backends/creation.py
+++ b/django/db/backends/creation.py
@@ -322,8 +322,9 @@ class BaseDatabaseCreation(object):
         self.connection.close()
         settings.DATABASE_NAME = test_database_name
         self.connection.settings_dict["DATABASE_NAME"] = test_database_name
-        settings.DATABASE_SUPPORTS_TRANSACTIONS = self._rollback_works()
-        self.connection.settings_dict["DATABASE_SUPPORTS_TRANSACTIONS"] = self._rollback_works()
+        can_rollback = self._rollback_works()
+        settings.DATABASE_SUPPORTS_TRANSACTIONS = can_rollback
+        self.connection.settings_dict["DATABASE_SUPPORTS_TRANSACTIONS"] = can_rollback
 
         call_command('syncdb', verbosity=verbosity, interactive=False)