diff --git a/ndsl/stencils/testing/serialbox_to_netcdf.py b/ndsl/stencils/testing/serialbox_to_netcdf.py
index bee0a789..453a861b 100644
--- a/ndsl/stencils/testing/serialbox_to_netcdf.py
+++ b/ndsl/stencils/testing/serialbox_to_netcdf.py
@@ -1,15 +1,19 @@
 import argparse
 import os
 import shutil
-import xarray as xr
+from typing import Any, Dict, Optional
+
 import f90nml
 import numpy as np
-from typing import Optional
+import xarray as xr
+
 
 try:
     import serialbox
 except ModuleNotFoundError:
-    raise ModuleNotFoundError("Serialbox couldn't be imported, make sure it's in your PYTHONPATH or you env")
+    raise ModuleNotFoundError(
+        "Serialbox couldn't be imported, make sure it's in your PYTHONPATH or you env"
+    )
 
 
 def get_parser():
@@ -23,7 +27,10 @@ def get_parser():
         "output_path", type=str, help="output directory where netcdf data will be saved"
     )
     parser.add_argument(
-        "-dn", "--data_name", type=str, help="[Optional] Give the name of the data, will default to Generator_rankX"
+        "-dn",
+        "--data_name",
+        type=str,
+        help="[Optional] Give the name of the data, will default to Generator_rankX",
     )
     return parser
 
@@ -43,7 +50,7 @@ def get_all_savepoint_names(serializer):
     return savepoint_names
 
 
-def get_serializer(data_path: str, rank:int , data_name:Optional[str] = None):
+def get_serializer(data_path: str, rank: int, data_name: Optional[str] = None):
     if data_name:
         name = data_name
     else:
@@ -73,14 +80,16 @@ def main(data_path: str, output_path: str, data_name: Optional[str] = None):
     for savepoint_name in sorted(list(savepoint_names)):
         rank_list = []
         names_list = list(
-            serializer_0.fields_at_savepoint(serializer_0.get_savepoint(savepoint_name)[0])
+            serializer_0.fields_at_savepoint(
+                serializer_0.get_savepoint(savepoint_name)[0]
+            )
         )
         serializer_list = []
         for rank in range(total_ranks):
             serializer = get_serializer(data_path, rank, data_name)
             serializer_list.append(serializer)
             savepoints = serializer.get_savepoint(savepoint_name)
-            rank_data = {}
+            rank_data: Dict[str, Any] = {}
             for name in set(names_list):
                 rank_data[name] = []
                 for savepoint in savepoints:
@@ -94,7 +103,12 @@ def main(data_path: str, output_path: str, data_name: Optional[str] = None):
             encoding = {}
             for varname in set(names_list).difference(["rank"]):
                 data_shape = list(rank_list[0][varname][0].shape)
-                if savepoint_name in ["FVDynamics-In", "FVDynamics-Out", "Driver-In", "Driver-Out"]:
+                if savepoint_name in [
+                    "FVDynamics-In",
+                    "FVDynamics-Out",
+                    "Driver-In",
+                    "Driver-Out",
+                ]:
                     if varname in [
                         "qvapor",
                         "qliquid",
@@ -138,10 +152,14 @@ def get_data(data_shape, total_ranks, n_savepoints, output_list, varname):
                 data[i_savepoint, rank] = output_list[rank][varname][i_savepoint]
     return data
 
+
 def entry_point():
     parser = get_parser()
     args = parser.parse_args()
-    main(data_path=args.data_path, output_path=args.output_path, data_name=args.data_name)
+    main(
+        data_path=args.data_path, output_path=args.output_path, data_name=args.data_name
+    )
+
 
 if __name__ == "__main__":
-    entry_point()
\ No newline at end of file
+    entry_point()