[2019/12/12 13:27:47.888] ERROR [0.203s]: test_map_reduce (test_collection.TestCollection)
 [2019/12/12 13:27:47.888] ----------------------------------------------------------------------
 [2019/12/12 13:27:47.888] Traceback (most recent call last):
 [2019/12/12 13:27:47.888]   File "/data/mci/354f7b1c62a143a9c6a1b6b31153dc54/src/test/test_collection.py", line 2093, in test_map_reduce
 [2019/12/12 13:27:47.888]     self.assertEqual(6, full_result["counts"]["emit"])
 [2019/12/12 13:27:47.888] KeyError: 'counts'
 [2019/12/12 13:27:47.888] ======================================================================
 [2019/12/12 13:27:47.888] ERROR [0.068s]: test_map_reduce_w_custom_type (test_custom_types.TestCollectionWCustomType)
 [2019/12/12 13:27:47.888] ----------------------------------------------------------------------
 [2019/12/12 13:27:47.888] Traceback (most recent call last):
 [2019/12/12 13:27:47.888]   File "/data/mci/354f7b1c62a143a9c6a1b6b31153dc54/src/test/test_custom_types.py", line 666, in test_map_reduce_w_custom_type
 [2019/12/12 13:27:47.888]     self.assertEqual(3, full_result["counts"]["emit"])
 [2019/12/12 13:27:47.888] KeyError: 'counts'
 [2019/12/12 13:27:47.888] ======================================================================
 [2019/12/12 13:27:47.888] ERROR [0.015s]: test_map_reduce_out (test_read_concern.TestReadConcern)
 [2019/12/12 13:27:47.888] ----------------------------------------------------------------------
 [2019/12/12 13:27:47.888] Traceback (most recent call last):
 [2019/12/12 13:27:47.888]   File "/data/mci/354f7b1c62a143a9c6a1b6b31153dc54/src/test/test_read_concern.py", line 127, in test_map_reduce_out
 [2019/12/12 13:27:47.888]     out='output_collection'))
 [2019/12/12 13:27:47.888]   File "/data/mci/354f7b1c62a143a9c6a1b6b31153dc54/src/pymongo/collection.py", line 3327, in __next__
 [2019/12/12 13:27:47.888]     raise TypeError("'Collection' object is not iterable")
 [2019/12/12 13:27:47.888] TypeError: 'Collection' object is not iterable