diff --git a/tests/test_types_extras.py b/tests/test_types_extras.py
index a5aa7d2b..eb30600d 100755
--- a/tests/test_types_extras.py
+++ b/tests/test_types_extras.py
@@ -366,9 +366,7 @@ class HstoreTestCase(ConnectingTestCase):
         from psycopg2.extras import register_hstore
         register_hstore(self.conn)
 
-        ds = []
-        ds.append({})
-        ds.append({'a': 'b', 'c': None})
+        ds = [{}, {'a': 'b', 'c': None}]
 
         ab = map(chr, range(32, 128))
         ds.append(dict(zip(ab, ab)))