diff --git a/scripts/abi_check.py b/scripts/abi_check.py
index e19f2c0c6..c2aca501d 100755
--- a/scripts/abi_check.py
+++ b/scripts/abi_check.py
@@ -29,7 +29,7 @@ from types import SimpleNamespace
 import xml.etree.ElementTree as ET
 
 
-class AbiChecker(object):
+class AbiChecker:
     """API and ABI checker."""
 
     def __init__(self, old_version, new_version, configuration):
diff --git a/tests/scripts/check-files.py b/tests/scripts/check-files.py
index 16aebb59a..65edecc78 100755
--- a/tests/scripts/check-files.py
+++ b/tests/scripts/check-files.py
@@ -17,7 +17,7 @@ import codecs
 import sys
 
 
-class FileIssueTracker(object):
+class FileIssueTracker:
     """Base class for file-wide issue tracking.
 
     To implement a checker that processes a file as a whole, inherit from
@@ -189,7 +189,7 @@ class MergeArtifactIssueTracker(LineIssueTracker):
         return False
 
 
-class IntegrityChecker(object):
+class IntegrityChecker:
     """Sanity-check files under the current directory."""
 
     def __init__(self, log_file):
diff --git a/tests/scripts/generate_test_code.py b/tests/scripts/generate_test_code.py
index 1fff09992..c0f99f74f 100755
--- a/tests/scripts/generate_test_code.py
+++ b/tests/scripts/generate_test_code.py
@@ -208,7 +208,7 @@ class GeneratorInputError(Exception):
     pass
 
 
-class FileWrapper(io.FileIO, object):
+class FileWrapper(io.FileIO):
     """
     This class extends built-in io.FileIO class with attribute line_no,
     that indicates line number for the line that is read.
diff --git a/tests/scripts/test_generate_test_code.py b/tests/scripts/test_generate_test_code.py
index 6d7113e18..e39b29b83 100755
--- a/tests/scripts/test_generate_test_code.py
+++ b/tests/scripts/test_generate_test_code.py
@@ -294,7 +294,7 @@ class GenDispatch(TestCase):
         self.assertEqual(code, expected)
 
 
-class StringIOWrapper(StringIO, object):
+class StringIOWrapper(StringIO):
     """
     file like class to mock file object in tests.
     """