diff --git a/src/nrfcloud_utils/claim_and_provision_device.py b/src/nrfcloud_utils/claim_and_provision_device.py
index ecebc88..500621a 100644
--- a/src/nrfcloud_utils/claim_and_provision_device.py
+++ b/src/nrfcloud_utils/claim_and_provision_device.py
@@ -15,8 +15,8 @@
     nrf_cloud_diap,
     create_device_credentials
 )
-from nrfcloud_utils.cli_helpers import is_linux, is_windows, is_macos, setup_logging
-from nrfcloud_utils.cli_helpers import CMD_TERM_DICT, CMD_TYPE_AUTO, CMD_TYPE_AT, CMD_TYPE_AT_SHELL, CMD_TYPE_TLS_SHELL, parser_add_comms_args
+from nrfcloud_utils.cli_helpers import setup_logging
+from nrfcloud_utils.cli_helpers import CMD_TERM_DICT, CMD_TYPE_AUTO, CMD_TYPE_AT, CMD_TYPE_AT_SHELL, parser_add_comms_args
 from cryptography import x509
 from cryptography.hazmat.primitives import serialization
 from nrfcredstore.comms import Comms
@@ -129,7 +129,7 @@ def main(in_args):
             error_exit(f'Device ID must not exceed {DEV_ID_MAX_LEN} characters')
 
     if 'CN=' in args.csr_attr:
-        error_exit(f'Do not include CN in --csr_attr. The device ID will be used as the CN')
+        error_exit('Do not include CN in --csr_attr. The device ID will be used as the CN')
 
     # load local CA cert and key if needed; assume not needed if using provisioning tags
     if args.provisioning_tags is None:
@@ -192,7 +192,7 @@ def main(in_args):
         logger.info(f'Unclaiming device {dev_uuid}...')
         api_res = nrf_cloud_diap.unclaim_device(args.api_key, dev_uuid)
         if api_res.status_code == 204:
-            logger.info(f'...success')
+            logger.info('...success')
         else:
             nrf_cloud_diap.print_api_result("Unclaim device response", api_res)
             logger.info("Device may not have been claimed before, continuing...")
diff --git a/src/nrfcloud_utils/claim_devices.py b/src/nrfcloud_utils/claim_devices.py
index ba9f97c..45408d8 100644
--- a/src/nrfcloud_utils/claim_devices.py
+++ b/src/nrfcloud_utils/claim_devices.py
@@ -9,7 +9,7 @@
 import argparse
 import logging
 from nrfcloud_utils import nrf_cloud_diap
-from nrfcloud_utils.cli_helpers import is_linux, is_windows, is_macos, setup_logging
+from nrfcloud_utils.cli_helpers import setup_logging
 
 logger = logging.getLogger(__name__)
 
diff --git a/src/nrfcloud_utils/cli_helpers.py b/src/nrfcloud_utils/cli_helpers.py
index 93018c7..9ea5dbe 100644
--- a/src/nrfcloud_utils/cli_helpers.py
+++ b/src/nrfcloud_utils/cli_helpers.py
@@ -62,7 +62,7 @@ def write_file(pathname, filename, bytes):
     if not path.isdir(pathname):
         try:
             makedirs(pathname, exist_ok=True)
-        except OSError as e:
+        except OSError:
             raise RuntimeError(f"Error creating file path [{pathname}]")
 
     full_path = path.join(pathname, filename)
diff --git a/src/nrfcloud_utils/create_device_credentials.py b/src/nrfcloud_utils/create_device_credentials.py
index 4c3a883..0c3d7d9 100644
--- a/src/nrfcloud_utils/create_device_credentials.py
+++ b/src/nrfcloud_utils/create_device_credentials.py
@@ -15,12 +15,7 @@
 from cryptography import x509
 import uuid
 from cryptography.x509 import (
-    Name,
-    NameAttribute,
-    BasicConstraints,
     KeyUsage,
-    AuthorityKeyIdentifier,
-    SubjectKeyIdentifier,
 )
 
 from nrfcloud_utils.cli_helpers import write_file, save_onboarding_csv, setup_logging
diff --git a/src/nrfcloud_utils/device_credentials_installer.py b/src/nrfcloud_utils/device_credentials_installer.py
index 2379b0f..17ee4a2 100644
--- a/src/nrfcloud_utils/device_credentials_installer.py
+++ b/src/nrfcloud_utils/device_credentials_installer.py
@@ -12,7 +12,7 @@
 import semver
 import logging
 from nrfcloud_utils import create_device_credentials, ca_certs, modem_credentials_parser
-from nrfcloud_utils.cli_helpers import write_file, save_devinfo_csv, save_onboarding_csv, is_linux, is_windows, is_macos, full_encoding, setup_logging
+from nrfcloud_utils.cli_helpers import write_file, save_devinfo_csv, save_onboarding_csv, full_encoding, setup_logging
 from nrfcloud_utils.cli_helpers import CMD_TERM_DICT, CMD_TYPE_AUTO, CMD_TYPE_AT, CMD_TYPE_AT_SHELL, CMD_TYPE_TLS_SHELL, parser_add_comms_args
 from nrfcredstore.command_interface import ATCommandInterface, TLSCredShellInterface
 from nrfcredstore.comms import Comms
@@ -377,30 +377,30 @@ def main(in_args):
     # write CA cert(s) to device
     nrf_ca_cert_text = format_cred(ca_certs.get_ca_certs(args.coap, stage=args.stage))
 
-    logger.info(f'Writing CA cert(s) to device...')
+    logger.info('Writing CA cert(s) to device...')
     try:
         cred_if.write_credential(args.sectag, 0, nrf_ca_cert_text)
     except Exception as e:
-        logger.error(f'Failed to write CA certificate to device')
+        logger.error('Failed to write CA certificate to device')
         logger.debug(f'Error details: {e}')
         raise
 
     # write dev cert to device
-    logger.info(f'Writing dev cert to device...')
+    logger.info('Writing dev cert to device...')
     try:
         cred_if.write_credential(args.sectag, 1, dev_text)
     except Exception as e:
-        logger.error(f'Failed to write device certificate to device')
+        logger.error('Failed to write device certificate to device')
         logger.debug(f'Error details: {e}')
         raise
 
     # If the private key was locally generated, write it to the device
     if prv_text is not None:
-        logger.info(f'Writing private key to device...')
+        logger.info('Writing private key to device...')
         try:
             cred_if.write_credential(args.sectag, 2, prv_text)
         except Exception as e:
-            logger.error(f'Failed to write private key to device')
+            logger.error('Failed to write private key to device')
             logger.debug(f'Error details: {e}')
             raise
 
diff --git a/src/nrfcloud_utils/gather_attestation_tokens.py b/src/nrfcloud_utils/gather_attestation_tokens.py
index 3c96221..f40e52c 100644
--- a/src/nrfcloud_utils/gather_attestation_tokens.py
+++ b/src/nrfcloud_utils/gather_attestation_tokens.py
@@ -8,8 +8,8 @@
 import csv
 import argparse
 from nrfcloud_utils import modem_credentials_parser
-from nrfcloud_utils.cli_helpers import is_linux, is_windows, is_macos, setup_logging
-from nrfcloud_utils.cli_helpers import CMD_TERM_DICT, CMD_TYPE_AUTO, CMD_TYPE_AT, CMD_TYPE_AT_SHELL, CMD_TYPE_TLS_SHELL, parser_add_comms_args
+from nrfcloud_utils.cli_helpers import setup_logging
+from nrfcloud_utils.cli_helpers import CMD_TERM_DICT, CMD_TYPE_AUTO, CMD_TYPE_AT, CMD_TYPE_AT_SHELL, parser_add_comms_args
 from nrfcredstore.comms import Comms
 from nrfcredstore.command_interface import ATCommandInterface
 from datetime import datetime, timezone
diff --git a/src/nrfcloud_utils/modem_credentials_parser.py b/src/nrfcloud_utils/modem_credentials_parser.py
index 1ef52d8..7ee7870 100644
--- a/src/nrfcloud_utils/modem_credentials_parser.py
+++ b/src/nrfcloud_utils/modem_credentials_parser.py
@@ -6,8 +6,6 @@
 
 import argparse
 import sys
-from os import path
-from os import makedirs
 from cbor2 import loads
 import base64
 import hashlib
diff --git a/src/nrfcloud_utils/nrf_cloud_diap.py b/src/nrfcloud_utils/nrf_cloud_diap.py
index 98333af..fd9a77f 100644
--- a/src/nrfcloud_utils/nrf_cloud_diap.py
+++ b/src/nrfcloud_utils/nrf_cloud_diap.py
@@ -5,7 +5,7 @@
 # SPDX-License-Identifier: BSD-3-Clause
 
 import requests
-import coloredlogs, logging
+import logging
 from nrfcloud_utils import ca_certs
 
 DEV_STAGE_DICT = {'dev':     '.dev.',
diff --git a/src/nrfcloud_utils/nrf_cloud_onboard.py b/src/nrfcloud_utils/nrf_cloud_onboard.py
index fb18ad8..5572685 100644
--- a/src/nrfcloud_utils/nrf_cloud_onboard.py
+++ b/src/nrfcloud_utils/nrf_cloud_onboard.py
@@ -13,9 +13,7 @@
 import os
 import io
 import logging
-from os import path
 from os import makedirs
-from ast import literal_eval
 from enum import Enum
 from nrfcloud_utils.cli_helpers import write_file, setup_logging
 
@@ -349,7 +347,7 @@ def check_file_path(file):
     if not os.path.exists(path):
         try:
             makedirs(path, exist_ok=True)
-        except OSError as e:
+        except OSError:
             logger.error("Error creating file path: " + path)
             return ''
 
diff --git a/tests/test_claim_and_provision_device.py b/tests/test_claim_and_provision_device.py
index b945ce2..32a77cc 100644
--- a/tests/test_claim_and_provision_device.py
+++ b/tests/test_claim_and_provision_device.py
@@ -3,10 +3,7 @@
 """
 
 from unittest.mock import patch, Mock
-from serial import Serial
-import pytest
 from nrfcloud_utils import claim_and_provision_device
-from tempfile import TemporaryDirectory
 from requests import Response
 from collections import namedtuple
 
@@ -46,7 +43,7 @@ class TestClaimAndProvisionDevice:
     def test_provisioning_tags(self, ser, select_device, diap):
         diap.claim_device = Mock(return_value=TEST_RESPONSE)
         diap.can_device_be_claimed = Mock(return_value=(True, ""))
-        args = f"--port /not/a/real/device --cmd-type at --api-key NOTAKEY --provisioning-tags nrf-cloud-onboarding".split()
+        args = "--port /not/a/real/device --cmd-type at --api-key NOTAKEY --provisioning-tags nrf-cloud-onboarding".split()
         # call DUT
         claim_and_provision_device.main(args)
         diap.claim_device.assert_called_once()
diff --git a/tests/test_create_ca_cert.py b/tests/test_create_ca_cert.py
index 335a127..15ece41 100644
--- a/tests/test_create_ca_cert.py
+++ b/tests/test_create_ca_cert.py
@@ -2,9 +2,7 @@
 Test for create_ca_cert.py
 """
 
-import pytest
 
-from unittest.mock import Mock
 from nrfcloud_utils import create_ca_cert
 from tempfile import TemporaryDirectory
 from cryptography.hazmat.primitives import serialization
diff --git a/tests/test_create_device_credentials.py b/tests/test_create_device_credentials.py
index bbe05b9..6479c2d 100644
--- a/tests/test_create_device_credentials.py
+++ b/tests/test_create_device_credentials.py
@@ -2,9 +2,7 @@
 Test for create_device_credentials.py
 """
 
-import pytest
 
-from unittest.mock import Mock
 from nrfcloud_utils import create_device_credentials
 from tempfile import TemporaryDirectory
 from cryptography.hazmat.primitives import serialization
diff --git a/tests/test_device_credentials_installer.py b/tests/test_device_credentials_installer.py
index 3e44b2f..91a4c59 100644
--- a/tests/test_device_credentials_installer.py
+++ b/tests/test_device_credentials_installer.py
@@ -3,8 +3,6 @@
 """
 
 from unittest.mock import patch, Mock
-from serial import Serial
-import pytest
 from nrfcloud_utils import device_credentials_installer
 from tempfile import TemporaryDirectory
 import os
diff --git a/tests/test_gather_attestation_tokens.py b/tests/test_gather_attestation_tokens.py
index dc85517..6e8b9f6 100644
--- a/tests/test_gather_attestation_tokens.py
+++ b/tests/test_gather_attestation_tokens.py
@@ -3,8 +3,6 @@
 """
 
 from unittest.mock import patch, Mock
-from serial import Serial
-import pytest
 from nrfcloud_utils import gather_attestation_tokens
 from tempfile import TemporaryDirectory
 import os
diff --git a/tests/test_modem_credentials_parser.py b/tests/test_modem_credentials_parser.py
index 7c23fee..956bf8e 100644
--- a/tests/test_modem_credentials_parser.py
+++ b/tests/test_modem_credentials_parser.py
@@ -3,9 +3,7 @@
 """
 
 
-import pytest
 
-from unittest.mock import Mock
 from nrfcloud_utils import modem_credentials_parser
 
 KEYGEN_CSR = "MIIBCjCBrwIBADAvMS0wKwYDVQQDDCQ1MDM2MzE1NC0zOTMxLTQ0ZjAtODAyMi0xMjFiNjQwMTYyN2QwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQqD6pNfa29o_EXnw62bnQWr8-JqsNh_HZxS3k3bMD4KZ8-qxnvgeoiqQ5zAycEP_Wcmzqypvwyf3qWMrZ2VB5aoB4wHAYJKoZIhvcNAQkOMQ8wDTALBgNVHQ8EBAMCA-gwDAYIKoZIzj0EAwIFAANIADBFAiEAv7OLZ_dXbszfhhjcLMUT72wTmw-z6GlgWxVhyWgR27ACIAvY_lPu3yfYZY5AL6uYTkUFp4GQkbSOUC_lsHyCxOuG.0oRDoQEmoQRBIVhL2dn3hQlQUDYxVDkxRPCAIhIbZAFifUERWCBwKj1W8FsvclMdZQgl4gBB4unZMYw0toU6uQZuXHLoDFAbhyLuHetYFWbiyxNZsnzSWEDUiTl7wwFt0hEsCiEQsxj-hCtpBk8Za8UXfdAycpx2faCOPJIrkfmiSS8-Y6_2tTAoAMN1BiWiTOimY1wZE3Ud"