diff --git a/django/db/backends/oracle/base.py b/django/db/backends/oracle/base.py
index 17faa17270..e72a06472c 100644
--- a/django/db/backends/oracle/base.py
+++ b/django/db/backends/oracle/base.py
@@ -78,6 +78,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     can_return_id_from_insert = True
     allow_sliced_subqueries = False
     supports_subqueries_in_group_by = False
+    supports_transactions = True
     supports_timezones = False
     supports_bitwise_or = False
     can_defer_constraint_checks = True
diff --git a/django/db/backends/postgresql_psycopg2/base.py b/django/db/backends/postgresql_psycopg2/base.py
index 013aaaa91e..b8d7fe3195 100644
--- a/django/db/backends/postgresql_psycopg2/base.py
+++ b/django/db/backends/postgresql_psycopg2/base.py
@@ -84,6 +84,7 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     has_select_for_update_nowait = True
     has_bulk_insert = True
     supports_tablespaces = True
+    supports_transactions = True
     can_distinct_on_fields = True
 
 class DatabaseWrapper(BaseDatabaseWrapper):