diff --git a/wagtail/admin/rich_text/converters/contentstate_models.py b/wagtail/admin/rich_text/converters/contentstate_models.py
index b8d12bb4e1..c1c3d85a3a 100644
--- a/wagtail/admin/rich_text/converters/contentstate_models.py
+++ b/wagtail/admin/rich_text/converters/contentstate_models.py
@@ -5,7 +5,7 @@ import string
 ALPHANUM = string.ascii_lowercase + string.digits
 
 
-class Block(object):
+class Block:
     def __init__(self, typ, depth=0):
         self.type = typ
         self.depth = depth
@@ -25,7 +25,7 @@ class Block(object):
         }
 
 
-class InlineStyleRange(object):
+class InlineStyleRange:
     def __init__(self, style):
         self.style = style
         self.offset = None
@@ -39,7 +39,7 @@ class InlineStyleRange(object):
         }
 
 
-class Entity(object):
+class Entity:
     def __init__(self, entity_type, mutability, data):
         self.entity_type = entity_type
         self.mutability = mutability
@@ -53,7 +53,7 @@ class Entity(object):
         }
 
 
-class EntityRange(object):
+class EntityRange:
     def __init__(self, key):
         self.key = key
         self.offset = None
@@ -67,7 +67,7 @@ class EntityRange(object):
         }
 
 
-class ContentState(object):
+class ContentState:
     """Pythonic representation of a draft.js contentState structure"""
     def __init__(self):
         self.blocks = []
diff --git a/wagtail/search/tests/test_page_search.py b/wagtail/search/tests/test_page_search.py
index 4ab4c56941..53ac110ffa 100644
--- a/wagtail/search/tests/test_page_search.py
+++ b/wagtail/search/tests/test_page_search.py
@@ -7,7 +7,7 @@ from wagtail.core.models import Page
 from wagtail.search.backends import get_search_backend
 
 
-class PageSearchTests(object):
+class PageSearchTests:
     # A TestCase with this class mixed in will be dynamically created
     # for each search backend defined in WAGTAILSEARCH_BACKENDS, with the backend name available
     # as self.backend_name
diff --git a/wagtail/utils/deprecation.py b/wagtail/utils/deprecation.py
index 76811c86fa..90c118eff1 100644
--- a/wagtail/utils/deprecation.py
+++ b/wagtail/utils/deprecation.py
@@ -13,7 +13,7 @@ class RemovedInWagtail29Warning(PendingDeprecationWarning):
     pass
 
 
-class MovedDefinitionHandler(object):
+class MovedDefinitionHandler:
     """
     A wrapper for module objects to enable definitions to be moved to a new module, with a
     deprecation path for the old location. Importing the name from the old location will
diff --git a/wagtail/utils/l18n/translation.py b/wagtail/utils/l18n/translation.py
index 242d53aa49..1ae66510df 100644
--- a/wagtail/utils/l18n/translation.py
+++ b/wagtail/utils/l18n/translation.py
@@ -8,7 +8,7 @@ from copy import copy, deepcopy
 import six
 
 
-class Trans(object):
+class Trans:
 
     def __init__(self):
         self.registry = {}
@@ -73,7 +73,7 @@ else:
             return s
 
 
-class L18NLazyObject(object):
+class L18NLazyObject:
 
     def _value(self, utf8=True):
         raise NotImplementedError