diff --git a/cities/utils/data_grabber.py b/cities/utils/data_grabber.py
index d36c01cd..740275a9 100644
--- a/cities/utils/data_grabber.py
+++ b/cities/utils/data_grabber.py
@@ -76,7 +76,6 @@ def __init__(self):
         sys.path.insert(0, self.data_path)
 
 
-
 def list_available_features(level="county"):
     root = find_repo_root()
 
@@ -85,9 +84,11 @@ def list_available_features(level="county"):
     elif level == "msa":
         folder_path = f"{root}/data/MSA_level"
     elif level == "census_tract":
-        folder_path = f"{root}/data/Census_tract_level"    
+        folder_path = f"{root}/data/Census_tract_level"
     else:
-        raise ValueError("Invalid level. Please choose 'county', 'census_tract' or 'msa'.")
+        raise ValueError(
+            "Invalid level. Please choose 'county', 'census_tract' or 'msa'."
+        )
 
     file_names = [f for f in os.listdir(folder_path) if f != ".gitkeep"]
     processed_file_names = []
@@ -113,11 +114,13 @@ def list_tensed_features(level="county"):
         all_features = list_available_features(level="msa")
 
     elif level == "census_tract":
-        data = CTDataGrabberCSV()                                      # TODO: Change to CTDataGrabber() in the future
-        all_features = list_available_features(level="Census_tract_level") 
+        data = CTDataGrabberCSV()  # TODO: Change to CTDataGrabber() in the future
+        all_features = list_available_features(level="Census_tract_level")
 
     else:
-        raise ValueError("Invalid level. Please choose 'county', 'census_tract' or 'msa'.")
+        raise ValueError(
+            "Invalid level. Please choose 'county', 'census_tract' or 'msa'."
+        )
 
     data.get_features_wide(all_features)
 
diff --git a/tests/test_data_grabber.py b/tests/test_data_grabber.py
index 5a8959d8..305765fb 100644
--- a/tests/test_data_grabber.py
+++ b/tests/test_data_grabber.py
@@ -5,7 +5,7 @@
 from cities.utils.data_grabber import (
     DataGrabber,
     MSADataGrabber,
-    CTDataGrabberCSV,             # TODO: Change to CTDataGrabber() in the future
+    CTDataGrabberCSV,  # TODO: Change to CTDataGrabber() in the future
     list_available_features,
     list_interventions,
     list_outcomes,
@@ -16,6 +16,7 @@
 features_msa = list_available_features("msa")
 features_ct = list_available_features("census_tract")
 
+
 def test_non_emptiness_DataGrabber():
     assert features is not None
 
@@ -41,9 +42,9 @@ def test_non_emptiness_DataGrabber():
         )
 
 
-def test_non_emptiness_MSADataGrabber(): 
+def test_non_emptiness_MSADataGrabber():
     os.chdir(os.path.dirname(os.getcwd()))
-    data_msa = MSADataGrabber()              
+    data_msa = MSADataGrabber()
 
     data_msa.get_features_wide(features_msa)
     data_msa.get_features_std_wide(features_msa)
@@ -57,10 +58,9 @@ def test_non_emptiness_MSADataGrabber():
         assert data_msa.std_long[feature].shape[1] == 4
 
 
-
 def test_non_emptiness_CTDataGrabber():
     os.chdir(os.path.dirname(os.getcwd()))
-    data_ct = CTDataGrabberCSV()                       # TODO: Change to CTDataGrabber() in the future
+    data_ct = CTDataGrabberCSV()  # TODO: Change to CTDataGrabber() in the future
 
     data_ct.get_features_wide(features_ct)
     data_ct.get_features_std_wide(features_ct)
@@ -74,7 +74,7 @@ def test_non_emptiness_CTDataGrabber():
         assert data_ct.std_long[feature].shape[1] == 4
 
 
-def general_data_format_testing(data, features, level = "county_msa"):
+def general_data_format_testing(data, features, level="county_msa"):
     assert features is not None
 
     data.get_features_wide(features)
@@ -95,7 +95,6 @@ def general_data_format_testing(data, features, level = "county_msa"):
 
     for feature in features:
         if level == "county_msa":
-
             namesFipsError = "FIPS codes and GeoNames don't match!"
             assert (
                 data.wide[feature]["GeoFIPS"].nunique()
@@ -115,9 +114,7 @@ def general_data_format_testing(data, features, level = "county_msa"):
             ), namesFipsError
 
         elif level == "census_tract":
-            
-            pass # TODO: check whether the county number is correct as indicated by the CT number
-
+            pass  # TODO: check whether the county number is correct as indicated by the CT number
 
     for feature in features:
         for column in data.wide[feature].columns[2:]:
@@ -173,11 +170,10 @@ def test_MSADataGrabber_data_types():
     general_data_format_testing(data_msa, features_msa)
 
 
-
 def test_CTDataGrabber_data_types():
-    data_ct = CTDataGrabberCSV()                   # TODO: Change to CTDataGrabber() in the future
+    data_ct = CTDataGrabberCSV()  # TODO: Change to CTDataGrabber() in the future
 
-    general_data_format_testing(data_ct, features_ct, level= "census_tract")
+    general_data_format_testing(data_ct, features_ct, level="census_tract")
 
 
 def test_feature_listing_runtime():
@@ -214,8 +210,7 @@ def test_GeoFIPS_ma_column_values():
         assert all(value > 9999 and str(value)[-1] == "0" for value in column_values)
 
 
-
-data_ct = CTDataGrabberCSV()                  # TODO: Change to CTDataGrabber() in the future
+data_ct = CTDataGrabberCSV()  # TODO: Change to CTDataGrabber() in the future
 data_ct.get_features_wide(features_ct)
 
 
@@ -225,5 +220,3 @@ def test_GeoFIPS_ct_column_values():
         column_values = data_ct.wide[feature]["GeoFIPS"]
 
         assert all(value > 999999999 for value in column_values)
-
-