diff --git a/examples/chef/chef.py b/examples/chef/chef.py
index 0ad749b19c295a..6a82a292d372b8 100755
--- a/examples/chef/chef.py
+++ b/examples/chef/chef.py
@@ -172,10 +172,14 @@ def main(argv: Sequence[str]) -> None:
                       dest="tty", metavar="TTY", default=None)
     parser.add_option("", "--generate_zzz", help="Populates zzz_generated/chef/<DEVICE_TYPE>/zap-generated with output of ZAP tool for every device in examples/chef/devices. If this flag is set, all other arguments are ignored except for --bootstrap_zap and --validate_zzz.",
                       dest="generate_zzz", action="store_true")
-    parser.add_option("", "--validate_zzz", help="Checks if cached ZAP output needs to be regenrated, for use in CI. If this flag is set, all other arguments are ignored.", dest="validate_zzz", action="store_true")
-    parser.add_option("", "--use_zzz", help="Use pre generated output from the ZAP tool found in the zzz_generated folder. Used to decrease execution time of CI jobs", dest="use_zzz", action="store_true")
-    parser.add_option("", "--build_all", help="Builds all chef examples across all platforms and collates artifacts. Chef exits after completion.", dest="build_all", action="store_true")
-    parser.add_option("", "--ci", help="Builds Chef examples defined in chef_util.ci_allowlist. Uses specified target. Chef exits after completion.", dest="ci", action="store_true")
+    parser.add_option("", "--validate_zzz", help="Checks if cached ZAP output needs to be regenrated, for use in CI. If this flag is set, all other arguments are ignored.",
+                      dest="validate_zzz", action="store_true")
+    parser.add_option("", "--use_zzz", help="Use pre generated output from the ZAP tool found in the zzz_generated folder. Used to decrease execution time of CI jobs",
+                      dest="use_zzz", action="store_true")
+    parser.add_option("", "--build_all", help="Builds all chef examples across all platforms and collates artifacts. Chef exits after completion.",
+                      dest="build_all", action="store_true")
+    parser.add_option(
+        "", "--ci", help="Builds Chef examples defined in chef_util.ci_allowlist. Uses specified target. Chef exits after completion.", dest="ci", action="store_true")
 
     options, _ = parser.parse_args(argv)
 
@@ -253,7 +257,8 @@ def main(argv: Sequence[str]) -> None:
                 shell.run_cmd(f"{_REPO_BASE_PATH}/scripts/tools/zap/generate.py\
  {_CHEF_SCRIPT_PATH}/devices/{device_name}.zap -o {device_out_dir}")
                 shell.run_cmd(f"touch {device_out_dir}/af-gen-event.h")
-        chef_util.generate_device_manifest(chef_devices_dir, include_zap_submod=True, write_manifest_file = True, ci_manifest_file_name = ci_manifest_file_name, repo_base_path=_REPO_BASE_PATH)
+        chef_util.generate_device_manifest(chef_devices_dir, include_zap_submod=True, write_manifest_file=True,
+                                           ci_manifest_file_name=ci_manifest_file_name, repo_base_path=_REPO_BASE_PATH)
         exit(0)
 
     #
diff --git a/examples/chef/chef_util.py b/examples/chef/chef_util.py
index 80f021edbeb941..61aa0c462c7974 100644
--- a/examples/chef/chef_util.py
+++ b/examples/chef/chef_util.py
@@ -10,6 +10,7 @@
     'nrfconnect': 'nrfconnect/build',
 }
 
+
 def check_zap_master(repo_base_path: str) -> str:
     """Produces hash of ZAP submodule in branch master"""
     git_cmd = ["git", "ls-tree", "master", "third_party/zap/repo"]
@@ -19,6 +20,7 @@ def check_zap_master(repo_base_path: str) -> str:
     print(f"zap commit: {zap_commit}")
     return zap_commit
 
+
 def generate_device_manifest(chef_devices_dir: str, include_zap_submod: bool = False, write_manifest_file: bool = False, ci_manifest_file_name: str = '', repo_base_path: str = '') -> dict:
     """Produces dictionary containing md5 of device dir zap files"""
     ci_manifest = {}
@@ -36,5 +38,5 @@ def generate_device_manifest(chef_devices_dir: str, include_zap_submod: bool = F
         ci_manifest["zap_commit"] = check_zap_master(repo_base_path)
     if write_manifest_file:
         with open(ci_manifest_file_name, "w+", encoding="utf-8") as ci_manifest_file:
-            ci_manifest_file.write(json.dumps(ci_manifest, indent=4))
+            ci_manifest_file.write(json.dumps(ci_manifest, indent=4)+"\n")
     return ci_manifest
diff --git a/examples/chef/cimanifest.json b/examples/chef/cimanifest.json
index 5521dc9ce43ac1..318370d55f39b9 100644
--- a/examples/chef/cimanifest.json
+++ b/examples/chef/cimanifest.json
@@ -1,4 +1,4 @@
 {
     "lighting-app": "41c55e72d06a04d193901d6b5487f7fa",
     "zap_commit": "6594a9257ce96ee6d852eed052939849b31259fc"
-}
\ No newline at end of file
+}