<details><summary>Test output</summary><br><pre>Traceback (most recent call last):

 "/workspace/datastore/cloud-ndb/flask_app_test.py", line 49, in test_index
eventually_consistent_test()

 "/workspace/datastore/cloud-ndb/.nox/py-3-6/lib/python3.6/site-packages/backoff/_sync.py", line 94, in retry
ret = target(*args, **kwargs)

 "/workspace/datastore/cloud-ndb/flask_app_test.py", line 47, in eventually_consistent_test
assert test_book.title in r.data.decode('utf-8')AssertionError: assert 'a0e0c1b3-7336-44a3-a892-3c62023ed949' in "[{'title': '297bd9df-f33a-4d72-b406-ca2d739ca07b'}, {'title': '3e628842-748a-461b-8da2-6b64a0fa6896'}, {'title': '4c1...-010473a80164'}, {'title': 'fe0c32a7-4492-4919-bc49-71865797014b'}, {'title': 'e396b44e-ad01-4698-9a12-f739c7b9c30b'}]"
Traceback (most recent call last):

 "C:\Users\racha\anaconda3\lib\site-packages\spyder\plugins\editor\widgets\codeeditor.py", line 4208, in mouseMoveEvent
and not self.is_completion_widget_visible()):

 "C:\Users\racha\anaconda3\lib\site-packages\spyder\plugins\editor\widgets\base.py", line 927, in is_completion_widget_visible
return self.completion_widget.isVisible()RuntimeError: wrapped C/C++ object of type CompletionWidget has been deleted