diff --git a/plone/registry/field.py b/plone/registry/field.py
index 6fcbbb8..5e1e3ac 100644
--- a/plone/registry/field.py
+++ b/plone/registry/field.py
@@ -11,7 +11,6 @@
 from zope.schema.interfaces import IContextSourceBinder
 from zope.schema.vocabulary import SimpleVocabulary
 
-import sys
 import zope.schema
 import zope.schema._field
 
diff --git a/plone/registry/recordsproxy.py b/plone/registry/recordsproxy.py
index 3467558..8cca9c9 100644
--- a/plone/registry/recordsproxy.py
+++ b/plone/registry/recordsproxy.py
@@ -5,14 +5,11 @@
 from zope.schema.interfaces import RequiredMissing
 
 import re
-import sys
 
 
 try:
     from UserDict import DictMixin
-    from UserDict import UserDict
 except ImportError:
-    from collections import UserDict
     from collections.abc import MutableMapping as DictMixin
 
 _marker = object()
diff --git a/plone/registry/registry.py b/plone/registry/registry.py
index 313f759..d9cf553 100644
--- a/plone/registry/registry.py
+++ b/plone/registry/registry.py
@@ -18,7 +18,6 @@
 from zope.schema import getFieldsInOrder
 
 import re
-import sys
 import warnings
 
 
@@ -109,7 +108,7 @@ def registerInterface(self, interface, omit=(), prefix=None):
                 bound_field = persistent_field.bind(existing_record)
                 try:
                     bound_field.validate(value)
-                except:
+                except Exception:
                     value = persistent_field.default
 
             self.records[record_name] = Record(persistent_field, value, _validate=False)