diff --git a/test/test_backfill_allocator.py b/test/test_backfill_allocator.py
index 54258cb35..2cb6c1313 100644
--- a/test/test_backfill_allocator.py
+++ b/test/test_backfill_allocator.py
@@ -137,6 +137,9 @@ class FakeQuery(object):
   def where(self, *args, **kwargs):
     return self
 
+  def order_by(self, *args, **kwargs):
+    return self
+
   def __iter__(self):
     return self._result_list.__iter__()