We were relying on an import * for doctests.

(Of course mostly for laziness -- but this now doesn't import the
exceptions module which doesn't appear in __all__, which was added for
E401 style lints, which...)

Author: Julian

docs/conf.py

@@ -76,6 +76,7 @@ def setup(app):
 
 doctest_global_setup = """
 from jsonschema import *
+from jsonschema import exceptions
 import jsonschema.validators
 """