diff --git a/npbackup/restic_metrics/__init__.py b/npbackup/restic_metrics/__init__.py
index 2aed421..394091c 100644
--- a/npbackup/restic_metrics/__init__.py
+++ b/npbackup/restic_metrics/__init__.py
@@ -478,7 +478,9 @@ def restic_output_2_metrics(restic_result, output, labels_string=None):
 
     metrics.append(
         'restic_backup_failure{{{},timestamp="{}"}} {}'.format(
-            labels_string, int(datetime.now(timezone.utc).timestamp()), 1 if errors else 0
+            labels_string,
+            int(datetime.now(timezone.utc).timestamp()),
+            1 if errors else 0,
         )
     )
     return errors, metrics
@@ -590,14 +592,16 @@ if __name__ == "__main__":
         logger.error("Output directory {} does not exist.".format(destination_dir))
         sys.exit(2)
 
-    labels_string = 'action="backup",backup_job="{}",instance="{}"'.format(instance, backup_job)
+    labels_string = 'action="backup",backup_job="{}",instance="{}"'.format(
+        instance, backup_job
+    )
     if args.labels:
         labels_string += ",{}".format(args.labels)
     destination_file = os.path.join(destination_dir, output_filename)
     try:
         with open(log_file, "r", encoding="utf-8") as file_handle:
             errors, metrics = restic_output_2_metrics(
-                True, output=file_handle.readlines(), labels=labels_string
+                True, output=file_handle.readlines(), labels_string=labels_string
             )
         if errors:
             logger.error("Script finished with errors.")
diff --git a/tests/test_npbackup-cli.py b/tests/test_npbackup-cli.py
index eba9160..4052077 100644
--- a/tests/test_npbackup-cli.py
+++ b/tests/test_npbackup-cli.py
@@ -113,8 +113,9 @@ def test_npbackup_cli_wrong_config_path():
             __main__.main()
     except SystemExit:
         print(str(logs))
-        assert "Config file npbackup-non-existent.conf cannot be read or does not exist" in str(
-            logs
+        assert (
+            "Config file npbackup-non-existent.conf cannot be read or does not exist"
+            in str(logs)
         ), "There should be a critical error when config file is not given"
 
 
diff --git a/tests/test_restic_metrics.py b/tests/test_restic_metrics.py
index 142dccf..f4fbecb 100644
--- a/tests/test_restic_metrics.py
+++ b/tests/test_restic_metrics.py
@@ -114,7 +114,7 @@ def test_restic_str_output_2_metrics():
     instance = "test"
     backup_job = "some_nas"
     labels_string = f'action="backup",backup_job="{backup_job}",instance="{instance}"'
-    
+
     for version, output in restic_str_outputs.items():
         print(f"Testing V1 parser restic str output from version {version}")
         errors, prom_metrics = restic_output_2_metrics(True, output, labels_string)