diff --git a/zipline/gens/sort.py b/zipline/gens/sort.py
index c76db032..d8ebd173 100644
--- a/zipline/gens/sort.py
+++ b/zipline/gens/sort.py
@@ -27,12 +27,11 @@ def date_sort(stream_in, source_ids):
         sources[id] = deque()
 
     # Process incoming streams.
-    log.info('Sorting first message')
     for message in stream_in:
         # Incoming messages should be the output of DATASOURCE_UNFRAME.
         assert_datasource_unframe_protocol(message), \
             "Bad message in date_sort: %s" % message
-        
+
         # Only allow messages from sources we expect.
         assert message.source_id in sources, "Unexpected source: %s" % message
 
@@ -45,13 +44,12 @@ def date_sort(stream_in, source_ids):
             message = pop_oldest(sources)
             assert_sort_protocol(message)
             yield message
-    
+
     # We should have only a done message left in each queue.
     for queue in sources.itervalues():
         assert len(queue) == 1, "Bad queue in date_sort on exit: %s" % queue
         assert queue[0].dt == "DONE", \
             "Bad last message in date_sort on exit: %s" % queue
-    log.info('Successfully finished Sorting')
 
 def ready(sources):
     """
diff --git a/zipline/utils/test_utils.py b/zipline/utils/test_utils.py
index 2ebbae73..99175c63 100644
--- a/zipline/utils/test_utils.py
+++ b/zipline/utils/test_utils.py
@@ -117,8 +117,8 @@ def drain_receiver(receiver, count=None):
     return output, transaction_count
 
 
-def assert_single_position(test, zipline):
-    output, transaction_count = drain_zipline(test, zipline)
+def assert_single_position(test, zipline, blocking=False):
+    output, transaction_count = drain_zipline(test, zipline, p_blocking=blocking)
 
     test.assertEqual(
         test.zipline_test_config['order_count'],