diff --git a/scripts/tools/telink/merge_factorydata_dac.py b/scripts/tools/telink/merge_factorydata_dac.py
index f38aac93366a46..c4ebf186832bdc 100644
--- a/scripts/tools/telink/merge_factorydata_dac.py
+++ b/scripts/tools/telink/merge_factorydata_dac.py
@@ -32,7 +32,9 @@
 
 import argparse
 
-def merge_factorydata_dac(factory_data_ext_path, dac_cert_key_path, dac_cert_start_address, output_path):
+
+def merge_factorydata_dac(factory_data_ext_path, dac_cert_key_path,
+                          dac_cert_start_address, output_path):
     # Read the content of the factory_data_ext.bin
     with open(factory_data_ext_path, 'rb') as f:
         factory_data_ext = f.read()
@@ -59,19 +61,26 @@ def merge_factorydata_dac(factory_data_ext_path, dac_cert_key_path, dac_cert_sta
 
     print(f"Firmware merged successfully into {output_path}")
 
+
 def main():
     # Setup argument parser
     parser = argparse.ArgumentParser(description='Merge firmware files.')
-    parser.add_argument('factory_data_ext_path', type=str, help='Path to the factory_data_ext.bin file')
-    parser.add_argument('dac_cert_key_path', type=str, help='Path to the dac_cert_key.bin file')
-    parser.add_argument('dac_cert_start_address', type=lambda x: int(x, 0), help='Start address for dac_cert_key.bin (e.g., 0x800)')
-    parser.add_argument('output_path', default="merged_factorydata_dac.bin", type=str, help='Path to the output merged firmware file')
+    parser.add_argument('factory_data_ext_path', type=str,
+                        help='Path to the factory_data_ext.bin file')
+    parser.add_argument('dac_cert_key_path', type=str,
+                        help='Path to the dac_cert_key.bin file')
+    parser.add_argument('dac_cert_start_address', type=lambda x: int(x, 0),
+                        help='Start address for dac_cert_key.bin (e.g., 0x800)')
+    parser.add_argument('output_path', default="merged_factorydata_dac.bin",
+                        type=str, help='Path to the output merged firmware file')
 
     # Parse the arguments
     args = parser.parse_args()
 
     # Call the merge function with the provided arguments
-    merge_factorydata_dac(args.factory_data_ext_path, args.dac_cert_key_path, args.dac_cert_start_address, args.output_path)
+    merge_factorydata_dac(args.factory_data_ext_path, args.dac_cert_key_path,
+                          args.dac_cert_start_address, args.output_path)
+
 
 if __name__ == '__main__':
-    main()
\ No newline at end of file
+    main()
diff --git a/scripts/tools/telink/mfg_tool.py b/scripts/tools/telink/mfg_tool.py
index 0760a8c9b3c12d..990dc0e75c5bfa 100644
--- a/scripts/tools/telink/mfg_tool.py
+++ b/scripts/tools/telink/mfg_tool.py
@@ -31,9 +31,9 @@
 import cryptography.hazmat.backends
 import cryptography.x509
 import pyqrcode
-from intelhex import IntelHex
-from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
 from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
+from intelhex import IntelHex
 
 TOOLS = {
     'spake2p': None,
@@ -457,7 +457,7 @@ def write_device_unique_data(args, out_dirs, pai_cert):
                 dacs = use_dac_cert_from_args(args, out_dirs)
             else:
                 dacs = generate_dac_cert(int(row['Index']), args, out_dirs, int(row['Discriminator']),
-                                        int(row['PIN Code']), pai_cert['key_pem'], pai_cert['cert_pem'])              
+                                         int(row['PIN Code']), pai_cert['key_pem'], pai_cert['cert_pem'])
             dac_cert_storage = read_der_file(dacs[0])
             dac_key_storage = read_key_bin_file(dacs[1])
             if not args.secure_programming_verification:
@@ -744,10 +744,10 @@ def base64_str(s): return base64.b64decode(s)
 
     secure_args = parser.add_argument_group('Secure programming verification options')
     secure_args.add_argument("--secure-programming-verification", action="store_true",
-                            help="Enable secure programming mode. When set, the script will perform additional steps for secure programming verification.")
+                             help="Enable secure programming mode. When set, the script will perform additional steps for secure programming verification.")
     secure_args.add_argument("--chip-id", required=False, type=str, help="Chip ID in hex format (32 hex characters).")
     secure_args.add_argument("--disable_serial_num_storage", action="store_true",
-                            help="Disable storage of serial-num in factorydata.")
+                             help="Disable storage of serial-num in factorydata.")
 
     args = parser.parse_args()