diff --git a/tests/test_postgresql.py b/tests/test_postgresql.py
index 6948b9ff..f6019f13 100644
--- a/tests/test_postgresql.py
+++ b/tests/test_postgresql.py
@@ -174,4 +174,4 @@ class TestPostgresql(unittest.TestCase):
         self.assertTrue(self.p.promote())
 
     def test_last_operation(self):
-        self.assertEquals(self.p.last_operation(), 0)
+        self.assertEquals(self.p.last_operation(), '0')