diff --git a/conftest.py b/conftest.py
index 8f297a5..4d0b927 100644
--- a/conftest.py
+++ b/conftest.py
@@ -56,7 +56,7 @@ def pytest_generate_tests(metafunc):
         metafunc.parametrize('version_ge_py38', sorted(ge38))
 
 
-class NormalizerIssueCase(object):
+class NormalizerIssueCase:
     """
     Static Analysis cases lie in the static_analysis folder.
     The tests also start with `#!`, like the goto_definition tests.
@@ -88,7 +88,7 @@ def pytest_configure(config):
         #root.addHandler(ch)
 
 
-class Checker():
+class Checker:
     def __init__(self, version, is_passing):
         self.version = version
         self._is_passing = is_passing
diff --git a/parso/cache.py b/parso/cache.py
index c0bb479..d96bb7b 100644
--- a/parso/cache.py
+++ b/parso/cache.py
@@ -102,7 +102,7 @@ def _get_cache_clear_lock(cache_path=None):
 parser_cache: Dict[str, Any] = {}
 
 
-class _NodeCacheItem(object):
+class _NodeCacheItem:
     def __init__(self, node, lines, change_time=None):
         self.node = node
         self.lines = lines
diff --git a/parso/file_io.py b/parso/file_io.py
index a9fcfe3..722e7ba 100644
--- a/parso/file_io.py
+++ b/parso/file_io.py
@@ -1,7 +1,7 @@
 import os
 
 
-class FileIO(object):
+class FileIO:
     def __init__(self, path):
         self.path = path
 
diff --git a/parso/normalizer.py b/parso/normalizer.py
index 5c5d2b9..fddb88f 100644
--- a/parso/normalizer.py
+++ b/parso/normalizer.py
@@ -105,7 +105,7 @@ class Normalizer(metaclass=_NormalizerMeta):
         return decorator
 
 
-class NormalizerConfig(object):
+class NormalizerConfig:
     normalizer_class = Normalizer
 
     def create_normalizer(self, grammar):
@@ -115,7 +115,7 @@ class NormalizerConfig(object):
         return self.normalizer_class(grammar, self)
 
 
-class Issue(object):
+class Issue:
     def __init__(self, node, code, message):
         self.code = code
         """
@@ -145,7 +145,7 @@ class Issue(object):
         return '<%s: %s>' % (self.__class__.__name__, self.code)
 
 
-class Rule(object):
+class Rule:
     code: int
     message: str
 
diff --git a/parso/parser.py b/parso/parser.py
index a7cc6fa..3b25f35 100644
--- a/parso/parser.py
+++ b/parso/parser.py
@@ -73,7 +73,7 @@ class Stack(list):
         return list(iterate())
 
 
-class StackNode(object):
+class StackNode:
     def __init__(self, dfa):
         self.dfa = dfa
         self.nodes = []
@@ -98,7 +98,7 @@ def _token_to_transition(grammar, type_, value):
     return type_
 
 
-class BaseParser(object):
+class BaseParser:
     """Parser engine.
 
     A Parser instance contains state pertaining to the current token
diff --git a/parso/python/diff.py b/parso/python/diff.py
index 1863413..ba999fa 100644
--- a/parso/python/diff.py
+++ b/parso/python/diff.py
@@ -247,7 +247,7 @@ def _update_positions(nodes, line_offset, last_leaf):
             _update_positions(children, line_offset, last_leaf)
 
 
-class DiffParser(object):
+class DiffParser:
     """
     An advanced form of parsing a file faster. Unfortunately comes with huge
     side effects. It changes the given module.
@@ -514,7 +514,7 @@ class DiffParser(object):
             yield token
 
 
-class _NodesTreeNode(object):
+class _NodesTreeNode:
     _ChildrenGroup = namedtuple(
         '_ChildrenGroup',
         'prefix children line_offset last_line_offset_leaf')
@@ -589,7 +589,7 @@ class _NodesTreeNode(object):
         return '<%s: %s>' % (self.__class__.__name__, self.tree_node)
 
 
-class _NodesTree(object):
+class _NodesTree:
     def __init__(self, module):
         self._base_node = _NodesTreeNode(module)
         self._working_stack = [self._base_node]
diff --git a/parso/python/errors.py b/parso/python/errors.py
index 9cdc9e0..9d28e54 100644
--- a/parso/python/errors.py
+++ b/parso/python/errors.py
@@ -222,7 +222,7 @@ def _any_fstring_error(version, node):
         return search_ancestor(node, "fstring")
 
 
-class _Context(object):
+class _Context:
     def __init__(self, node, add_syntax_error, parent_context=None):
         self.node = node
         self.blocks = []
diff --git a/parso/python/pep8.py b/parso/python/pep8.py
index 13e17ed..d3eb345 100644
--- a/parso/python/pep8.py
+++ b/parso/python/pep8.py
@@ -26,7 +26,7 @@ _IMPLICIT_INDENTATION_TYPES = ('dictorsetmaker', 'argument')
 _POSSIBLE_SLICE_PARENTS = ('subscript', 'subscriptlist', 'sliceop')
 
 
-class IndentationTypes(object):
+class IndentationTypes:
     VERTICAL_BRACKET = object()
     HANGING_BRACKET = object()
     BACKSLASH = object()
diff --git a/parso/python/prefix.py b/parso/python/prefix.py
index 7fac9fc..c764c46 100644
--- a/parso/python/prefix.py
+++ b/parso/python/prefix.py
@@ -6,7 +6,7 @@ from parso.python.tokenize import group
 unicode_bom = BOM_UTF8.decode('utf-8')
 
 
-class PrefixPart(object):
+class PrefixPart:
     def __init__(self, leaf, typ, value, spacing='', start_pos=None):
         assert start_pos is not None
         self.parent = leaf
diff --git a/parso/python/token.py b/parso/python/token.py
index eda08f1..9b6f4c7 100644
--- a/parso/python/token.py
+++ b/parso/python/token.py
@@ -3,7 +3,7 @@ from __future__ import absolute_import
 from enum import Enum
 
 
-class TokenType(object):
+class TokenType:
     name: str
     contains_syntax: bool
 
diff --git a/parso/python/tokenize.py b/parso/python/tokenize.py
index 896772e..6282275 100644
--- a/parso/python/tokenize.py
+++ b/parso/python/tokenize.py
@@ -246,7 +246,7 @@ class PythonToken(Token):
                 self._replace(type=self.type.name))
 
 
-class FStringNode(object):
+class FStringNode:
     def __init__(self, quote):
         self.quote = quote
         self.parentheses_count = 0
diff --git a/parso/python/tree.py b/parso/python/tree.py
index 850835d..04fbe71 100644
--- a/parso/python/tree.py
+++ b/parso/python/tree.py
@@ -68,7 +68,7 @@ _GET_DEFINITION_TYPES = set([
 _IMPORTS = set(['import_name', 'import_from'])
 
 
-class DocstringMixin(object):
+class DocstringMixin:
     __slots__ = ()
 
     def get_doc_node(self):
@@ -96,7 +96,7 @@ class DocstringMixin(object):
         return None
 
 
-class PythonMixin(object):
+class PythonMixin:
     """
     Some Python specific utilities.
     """
@@ -296,7 +296,7 @@ class FStringEnd(PythonLeaf):
     __slots__ = ()
 
 
-class _StringComparisonMixin(object):
+class _StringComparisonMixin:
     def __eq__(self, other):
         """
         Make comparisons with strings easy.
diff --git a/parso/tree.py b/parso/tree.py
index ec58ed9..2c7312d 100644
--- a/parso/tree.py
+++ b/parso/tree.py
@@ -18,7 +18,7 @@ def search_ancestor(node, *node_types):
             return node
 
 
-class NodeOrLeaf(object):
+class NodeOrLeaf:
     """
     The base class for nodes and leaves.
     """
diff --git a/test/test_diff_parser.py b/test/test_diff_parser.py
index 3f120bc..222236e 100644
--- a/test/test_diff_parser.py
+++ b/test/test_diff_parser.py
@@ -38,7 +38,7 @@ def _check_error_leaves_nodes(node):
     return None
 
 
-class Differ(object):
+class Differ:
     grammar = load_grammar()
 
     def initialize(self, code):
diff --git a/test/test_normalizer_issues_files.py b/test/test_normalizer_issues_files.py
index 03e09ef..0427313 100644
--- a/test/test_normalizer_issues_files.py
+++ b/test/test_normalizer_issues_files.py
@@ -12,7 +12,7 @@ from parso.utils import python_bytes_to_unicode
 
 
 @total_ordering
-class WantedIssue(object):
+class WantedIssue:
     def __init__(self, code, line, column):
         self.code = code
         self._line = line
diff --git a/test/test_parser_tree.py b/test/test_parser_tree.py
index 0964567..0201f7c 100644
--- a/test/test_parser_tree.py
+++ b/test/test_parser_tree.py
@@ -8,7 +8,7 @@ from parso import parse
 from parso.python import tree
 
 
-class TestsFunctionAndLambdaParsing(object):
+class TestsFunctionAndLambdaParsing:
 
     FIXTURES = [
         ('def my_function(x, y, z) -> str:\n    return x + y * z\n', {