1 files changed, 6 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index e759a74faf..294f4c1929 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -324,9 +324,12 @@ module ActiveRecord
       end
 
       def supports_insert_with_returning?
-        @supports_insert_with_returning ||=
-          @connection.respond_to?(:server_version) &&
-          @connection.server_version >= 80200
+        unless defined? @supports_insert_with_returning
+          @supports_insert_with_returning =
+            @connection.respond_to?(:server_version) &&
+            @connection.server_version >= 80200
+        end
+        @supports_insert_with_returning
       end
 
       # Returns the configured supported identifier length supported by PostgreSQL,