Merge ~cjwatson/lazr.restful:doctest-remove-py2-exception-module into lazr.restful:main

[Colin Watson]

Remove all uses of IGNORE_EXCEPTION_MODULE_IN_PYTHON2

This is no longer needed now that we require Python 3.

[Jürgen Gmach (jugmac00)]

review: Approve

diff --git a/src/lazr/restful/docs/fields.rst b/src/lazr/restful/docs/fields.rst
index 869eb20..5ba2e0f 100644
--- a/src/lazr/restful/docs/fields.rst
+++ b/src/lazr/restful/docs/fields.rst
@@ -43,7 +43,6 @@ elements.
 But if the object isn't iterable, NotAContainer is raised.
 
     >>> int_collection.validate(object())
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
     zope.schema._bootstrapinterfaces.NotAContainer: <object...>
@@ -51,7 +50,6 @@ But if the object isn't iterable, NotAContainer is raised.
 If the iterable contains an invalid item, WrongContainedType is raised.
 
     >>> int_collection.validate(['a', 1, 2, 'b'])
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
     zope.schema._bootstrapinterfaces.WrongContainedType: ...
@@ -79,7 +77,6 @@ by value, but only check that the value provides the proper schema.
     ...     pass
     >>> fake = Fake()
     >>> reference.validate(fake)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
     zope.schema._bootstrapinterfaces.SchemaNotProvided: ...
@@ -95,7 +92,6 @@ The Reference field supports the standard IField constraint.
 
     >>> fake.a_value = 'bad'
     >>> reference.validate(fake)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
     zope.schema._bootstrapinterfaces.ConstraintNotSatisfied: ...
diff --git a/src/lazr/restful/docs/interface.rst b/src/lazr/restful/docs/interface.rst
index afcd439..1fdf251 100644
--- a/src/lazr/restful/docs/interface.rst
+++ b/src/lazr/restful/docs/interface.rst
@@ -174,7 +174,6 @@ If the value for an overridden field is invalid, an exception will be
 raised:
 
     >>> copy_field(MyModel['age'], title=b'This should be unicode')
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
     zope.schema._bootstrapinterfaces.WrongType: ...
diff --git a/src/lazr/restful/docs/multiversion.rst b/src/lazr/restful/docs/multiversion.rst
index d3c95d3..d1f3863 100644
--- a/src/lazr/restful/docs/multiversion.rst
+++ b/src/lazr/restful/docs/multiversion.rst
@@ -408,7 +408,6 @@ you can't just adapt Contact to IEntry.
     >>> from zope.component import getAdapter
 
     >>> getAdapter(C1, IEntry)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.interface.interfaces.ComponentLookupError: ...
@@ -788,10 +787,10 @@ service will fail.
 
     >>> request = create_web_service_request('/1.0/contact_list')
     >>> resource = request.traverse(None)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
-    zope.publisher.interfaces.NotFound: Object: <PostBetaServiceRootResource...>, name: ...'contact_list'
+    zope.publisher.interfaces.NotFound:
+    Object: <PostBetaServiceRootResource...>, name: ...'contact_list'
 
 Here's the contact list under its correct URL.
 
@@ -842,10 +841,10 @@ to traverse to its 'beta' name ('fax') will fail.
     >>> request_10 = create_web_service_request(
     ...     '/1.0/contacts/Cleo Python/fax')
     >>> field = request_10.traverse(None)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
-    zope.publisher.interfaces.NotFound: Object: <Contact object...>, name: ...'fax'
+    zope.publisher.interfaces.NotFound:
+    Object: <Contact object...>, name: ...'fax'
 
 We can invoke a named operation. Note that the name of the operation
 is now 'find' (it was 'findContacts' in 'beta'). And note that
@@ -960,18 +959,18 @@ version.
     >>> request_beta = create_web_service_request(
     ...     '/dev/contacts/Cleo Python/fax')
     >>> field = request_beta.traverse(None)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
-    zope.publisher.interfaces.NotFound: Object: <Contact object...>, name: ...'fax'
+    zope.publisher.interfaces.NotFound:
+    Object: <Contact object...>, name: ...'fax'
 
     >>> request_beta = create_web_service_request(
     ...     '/dev/contacts/Cleo Python/fax_number')
     >>> field = request_beta.traverse(None)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
-    zope.publisher.interfaces.NotFound: Object: <Contact object...>, name: ...'fax_number'
+    zope.publisher.interfaces.NotFound:
+    Object: <Contact object...>, name: ...'fax_number'
 
 We can invoke a named operation.
 
diff --git a/src/lazr/restful/docs/webservice-declarations.rst b/src/lazr/restful/docs/webservice-declarations.rst
index be31dde..41826d7 100644
--- a/src/lazr/restful/docs/webservice-declarations.rst
+++ b/src/lazr/restful/docs/webservice-declarations.rst
@@ -1658,20 +1658,20 @@ can neither get nor set attributes.
     >>> _ = multiple_scopes_method_adapter.call()
     multiple_scopes called
     >>> _ = unscoped_method_adapter.call()
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication only allows calling scoped methods.
+    zope.security.interfaces.Unauthorized: Current authentication only allows
+    calling scoped methods.
     >>> print(scoped_entry_adapter.value)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication only allows calling scoped methods.
+    zope.security.interfaces.Unauthorized: Current authentication only allows
+    calling scoped methods.
     >>> scoped_entry_adapter.value = 'set by scoped user'
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication only allows calling scoped methods.
+    zope.security.interfaces.Unauthorized: Current authentication only allows
+    calling scoped methods.
 
 A user with one scope can only call the methods tagged with that scope, and
 can neither get nor set attributes.
@@ -1680,53 +1680,53 @@ can neither get nor set attributes.
     >>> _ = get_info_method_adapter.call()
     get_info called
     >>> _ = do_update_method_adapter.call()
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication does not allow calling this method (one of these scopes is required: 'update').
+    zope.security.interfaces.Unauthorized: Current authentication does not
+    allow calling this method (one of these scopes is required: 'update').
     >>> _ = multiple_scopes_method_adapter.call()
     multiple_scopes called
     >>> _ = unscoped_method_adapter.call()
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication only allows calling scoped methods.
+    zope.security.interfaces.Unauthorized: Current authentication only allows
+    calling scoped methods.
     >>> print(scoped_entry_adapter.value)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication only allows calling scoped methods.
+    zope.security.interfaces.Unauthorized: Current authentication only allows
+    calling scoped methods.
     >>> scoped_entry_adapter.value = 'set by scoped user'
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication only allows calling scoped methods.
+    zope.security.interfaces.Unauthorized: Current authentication only allows
+    calling scoped methods.
 
     >>> config._scopes = ['update']
     >>> _ = get_info_method_adapter.call()
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication does not allow calling this method (one of these scopes is required: 'read').
+    zope.security.interfaces.Unauthorized: Current authentication does not
+    allow calling this method (one of these scopes is required: 'read').
     >>> _ = do_update_method_adapter.call()
     do_update called
     >>> _ = multiple_scopes_method_adapter.call()
     multiple_scopes called
     >>> _ = unscoped_method_adapter.call()
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication only allows calling scoped methods.
+    zope.security.interfaces.Unauthorized: Current authentication only allows
+    calling scoped methods.
     >>> print(scoped_entry_adapter.value)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication only allows calling scoped methods.
+    zope.security.interfaces.Unauthorized: Current authentication only allows
+    calling scoped methods.
     >>> scoped_entry_adapter.value = 'set by scoped user'
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.security.interfaces.Unauthorized: Current authentication only allows calling scoped methods.
+    zope.security.interfaces.Unauthorized: Current authentication only allows
+    calling scoped methods.
 
     >>> config._scopes = None
 
@@ -2843,10 +2843,12 @@ An attempt to register this module with ZCML results in an error
 explaining the problem.
 
     >>> register_test_module('wrongorder', WrongOrderVersions)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
-    zope.configuration.config.ConfigurationExecutionError: ...AssertionError... Annotations on "WrongOrderVersions.method" put an earlier version on top of a later version: "beta", "2.0", "1.0". The correct order is: "beta", "1.0", "2.0"...
+    zope.configuration.config.ConfigurationExecutionError: ...AssertionError...
+    Annotations on "WrongOrderVersions.method" put an earlier version on top of
+    a later version: "beta", "2.0", "1.0". The correct order is: "beta", "1.0",
+    "2.0"...
 
 Here's a class in which a named operation is removed in version 1.0
 and then annotated without being reinstated.
@@ -2863,10 +2865,11 @@ and then annotated without being reinstated.
     ...         """A method."""
 
     >>> register_test_module('annotatingremoved', AnnotatingARemovedMethod)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
-    zope.configuration.config.ConfigurationExecutionError: ... Method "method" contains annotations for version "2.0", even though it's not published in that version. The bad annotations are: "as", "params"...
+    zope.configuration.config.ConfigurationExecutionError: ... Method "method"
+    contains annotations for version "2.0", even though it's not published in
+    that version. The bad annotations are: "as", "params"...
 
 Mutators as named operations
 ----------------------------
@@ -2934,7 +2937,6 @@ defines 1.0 as the last version in which mutators are published as
 named operations.
 
     >>> operation_for(context, '2.0', 'set_value')
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.interface.interfaces.ComponentLookupError: ...
@@ -2967,13 +2969,11 @@ operations ('1.0').
 
     >>> context = Mutator20()
     >>> operation_for(context, '1.0', 'set_value')
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.interface.interfaces.ComponentLookupError: ...
 
     >>> operation_for(context, '2.0', 'set_value')
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.interface.interfaces.ComponentLookupError: ...
@@ -3018,7 +3018,6 @@ The operation is not available in 'beta', because it hasn't been
 defined yet.
 
     >>> print(operation_for(context, 'beta', 'set_value').__class__.__name__)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.interface.interfaces.ComponentLookupError: ...
@@ -3038,7 +3037,6 @@ The operation is not available in 3.0, the version in which it becomes
 a mutator.
 
     >>> operation_for(context, '3.0', 'set_value')
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.interface.interfaces.ComponentLookupError: ...
@@ -3152,7 +3150,6 @@ Back when last_version_with_mutator_named_operations was '1.0', the
 
     >>> context = BetaMutator2()
     >>> operation_for(context, 'beta', 'set_value')
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.interface.interfaces.ComponentLookupError: ...
diff --git a/src/lazr/restful/docs/webservice.rst b/src/lazr/restful/docs/webservice.rst
index 477b762..d4fd3eb 100644
--- a/src/lazr/restful/docs/webservice.rst
+++ b/src/lazr/restful/docs/webservice.rst
@@ -688,10 +688,10 @@ But the invariant will complain if that isn't true.
     >>> verifyObject(IAuthorEntry, InvalidAuthorEntry(A1, request))
     True
     >>> IAuthorEntry.validateInvariants(InvalidAuthorEntry(A1, request))
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
       ...
-    zope.interface.exceptions.Invalid: InvalidAuthorEntry doesn't provide its ICookbookEntry schema.
+    zope.interface.exceptions.Invalid: InvalidAuthorEntry doesn't provide its
+    ICookbookEntry schema.
 
 Other entries are defined similarly.
 
@@ -1772,7 +1772,6 @@ an error.
     ...     "Baked beans")
     >>> get_request = create_web_service_request(private_recipe_url)
     >>> recipe_resource = get_request.traverse(app)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.security.interfaces.Unauthorized: (<Recipe object...>, 'dish', ...)
@@ -1883,7 +1882,7 @@ A newly created cookbook has no cover.
     >>> cover_url = quote('/beta/cookbooks/The Joy of Cooking/cover')
     >>> get_request = create_web_service_request(cover_url)
     >>> file_resource = get_request.traverse(app)
-    >>> file_resource()  # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
+    >>> file_resource()
     Traceback (most recent call last):
     ...
     zope.publisher.interfaces.NotFound: ... name: 'cover'
@@ -1922,7 +1921,7 @@ The cover can be deleted with DELETE.
 
     >>> get_request = create_web_service_request(cover_url)
     >>> file_resource = get_request.traverse(app)
-    >>> file_resource()  # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
+    >>> file_resource()
     Traceback (most recent call last):
     ...
     zope.publisher.interfaces.NotFound: ... name: 'cover'
@@ -1949,7 +1948,6 @@ NotFound exception.
 Requesting a non-existent top-level collection:
 
     >>> create_web_service_request('/beta/nosuchcollection').traverse(app)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.publisher.interfaces.NotFound: ... name: ...'nosuchcollection'
@@ -1957,7 +1955,6 @@ Requesting a non-existent top-level collection:
 Requesting a non-existent cookbook:
 
     >>> create_web_service_request('/beta/cookbooks/104').traverse(app)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.publisher.interfaces.NotFound: ... name: ...'104'
@@ -1966,7 +1963,6 @@ Requesting a non-existent comment:
 
     >>> create_web_service_request(
     ...  '/beta/cookbooks/The%20Joy%20of%20Cooking/comments/10').traverse(app)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.publisher.interfaces.NotFound: ... name: ...'comments/10'
@@ -2139,10 +2135,10 @@ Now you don't.
 
     >>> resource = create_web_service_request(
     ...     recipe_url, method='GET').traverse(app)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
-    zope.publisher.interfaces.NotFound: ... name: ...'recipes/Foies de voilaille en aspic'
+    zope.publisher.interfaces.NotFound: ... name: ...'recipes/Foies de
+    voilaille en aspic'
 
 
 Within a template
diff --git a/src/lazr/restful/example/base/tests/representation-cache.txt b/src/lazr/restful/example/base/tests/representation-cache.txt
index d67ee0b..a38bba8 100644
--- a/src/lazr/restful/example/base/tests/representation-cache.txt
+++ b/src/lazr/restful/example/base/tests/representation-cache.txt
@@ -13,7 +13,6 @@ installed; in fact, this is the only test that uses one.
     >>> from zope.component import getUtility
     >>> from lazr.restful.interfaces import IRepresentationCache
     >>> getUtility(IRepresentationCache)
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.interface.interfaces.ComponentLookupError: ...
diff --git a/src/lazr/restful/example/base/tests/test_integration.py b/src/lazr/restful/example/base/tests/test_integration.py
index f0bbbb1..fc5e0a4 100644
--- a/src/lazr/restful/example/base/tests/test_integration.py
+++ b/src/lazr/restful/example/base/tests/test_integration.py
@@ -9,7 +9,6 @@ import doctest
 from pkg_resources import resource_filename
 
 from van.testing.layer import zcml_layer, wsgi_intercept_layer
-from zope.testing import renormalizing
 
 from lazr.restful.example.base.root import CookbookServiceRootResource
 from lazr.restful.testing.webservice import (
@@ -28,9 +27,6 @@ DOCTEST_FLAGS = (
 )
 
 
-checker = renormalizing.OutputChecker()
-
-
 class FunctionalLayer:
     allow_teardown = False
     zcml = os.path.abspath(resource_filename("lazr.restful", "ftesting.zcml"))
@@ -56,10 +52,7 @@ def load_tests(loader, tests, pattern):
         if name.endswith(".txt")
     )
     suite = doctest.DocFileSuite(
-        *doctest_files,
-        optionflags=DOCTEST_FLAGS,
-        encoding="UTF-8",
-        checker=checker,
+        *doctest_files, optionflags=DOCTEST_FLAGS, encoding="UTF-8"
     )
     suite.layer = WSGILayer
     tests.addTest(suite)
diff --git a/src/lazr/restful/example/base/tests/traversal.txt b/src/lazr/restful/example/base/tests/traversal.txt
index 8b25884..a00169a 100644
--- a/src/lazr/restful/example/base/tests/traversal.txt
+++ b/src/lazr/restful/example/base/tests/traversal.txt
@@ -21,7 +21,6 @@ If the object cannot be found, publishTraverse raises a NotFound
 error.
 
     >>> container.publishTraverse(request, "nosuchname")
-    ... # doctest: +IGNORE_EXCEPTION_MODULE_IN_PYTHON2
     Traceback (most recent call last):
     ...
     zope.publisher.interfaces.NotFound: ... name: 'nosuchname'
diff --git a/src/lazr/restful/example/base_extended/tests/test_integration.py b/src/lazr/restful/example/base_extended/tests/test_integration.py
index 866c905..c189634 100644
--- a/src/lazr/restful/example/base_extended/tests/test_integration.py
+++ b/src/lazr/restful/example/base_extended/tests/test_integration.py
@@ -9,7 +9,6 @@ import doctest
 from pkg_resources import resource_filename
 
 from van.testing.layer import zcml_layer, wsgi_intercept_layer
-from zope.testing import renormalizing
 
 from lazr.restful.example.base.tests.test_integration import (
     CookbookWebServiceTestPublication,
@@ -18,9 +17,6 @@ from lazr.restful.example.base.tests.test_integration import (
 from lazr.restful.testing.webservice import WebServiceApplication
 
 
-checker = renormalizing.OutputChecker()
-
-
 class FunctionalLayer:
     allow_teardown = False
     zcml = os.path.abspath(
@@ -43,9 +39,7 @@ wsgi_intercept_layer(WSGILayer)
 def load_tests(loader, tests, pattern):
     """See `zope.testing.testrunner`."""
     doctest_files = ["../README.txt"]
-    suite = doctest.DocFileSuite(
-        *doctest_files, optionflags=DOCTEST_FLAGS, checker=checker
-    )
+    suite = doctest.DocFileSuite(*doctest_files, optionflags=DOCTEST_FLAGS)
     suite.layer = WSGILayer
     tests.addTest(suite)
     return tests
diff --git a/src/lazr/restful/example/multiversion/tests/test_integration.py b/src/lazr/restful/example/multiversion/tests/test_integration.py
index ee04982..d36db07 100644
--- a/src/lazr/restful/example/multiversion/tests/test_integration.py
+++ b/src/lazr/restful/example/multiversion/tests/test_integration.py
@@ -10,7 +10,6 @@ from pkg_resources import resource_filename
 
 from van.testing.layer import zcml_layer, wsgi_intercept_layer
 from zope.component import getUtility
-from zope.testing import renormalizing
 
 from lazr.restful.example.multiversion.root import (
     MultiversionWebServiceRootResource,
@@ -25,9 +24,6 @@ DOCTEST_FLAGS = (
 )
 
 
-checker = renormalizing.OutputChecker()
-
-
 class FunctionalLayer:
     zcml = os.path.abspath(
         resource_filename("lazr.restful.example.multiversion", "site.zcml")
@@ -56,9 +52,7 @@ def load_tests(loader, tests, pattern):
         for name in os.listdir(os.path.dirname(__file__))
         if name.endswith(".txt")
     )
-    suite = doctest.DocFileSuite(
-        *doctest_files, optionflags=DOCTEST_FLAGS, checker=checker
-    )
+    suite = doctest.DocFileSuite(*doctest_files, optionflags=DOCTEST_FLAGS)
     suite.layer = WSGILayer
     tests.addTest(suite)
     return tests
diff --git a/src/lazr/restful/example/wsgi/tests/test_integration.py b/src/lazr/restful/example/wsgi/tests/test_integration.py
index cc02ba7..84b2017 100644
--- a/src/lazr/restful/example/wsgi/tests/test_integration.py
+++ b/src/lazr/restful/example/wsgi/tests/test_integration.py
@@ -10,7 +10,6 @@ from pkg_resources import resource_filename
 
 from van.testing.layer import zcml_layer, wsgi_intercept_layer
 from zope.component import getUtility
-from zope.testing import renormalizing
 
 from lazr.restful.example.wsgi.root import WSGIExampleWebServiceRootResource
 from lazr.restful.interfaces import IWebServiceConfiguration
@@ -23,9 +22,6 @@ DOCTEST_FLAGS = (
 )
 
 
-checker = renormalizing.OutputChecker()
-
-
 class FunctionalLayer:
     zcml = os.path.abspath(
         resource_filename("lazr.restful.example.wsgi", "site.zcml")
@@ -54,9 +50,7 @@ def load_tests(loader, tests, pattern):
         for name in os.listdir(os.path.dirname(__file__))
         if name.endswith(".txt")
     )
-    suite = doctest.DocFileSuite(
-        *doctest_files, optionflags=DOCTEST_FLAGS, checker=checker
-    )
+    suite = doctest.DocFileSuite(*doctest_files, optionflags=DOCTEST_FLAGS)
     suite.layer = WSGILayer
     tests.addTest(suite)
     return tests