diff --git a/premise/external.py b/premise/external.py
index 8d08da92..fdf92b91 100644
--- a/premise/external.py
+++ b/premise/external.py
@@ -435,11 +435,12 @@ def __init__(
 
         external_scenario_regions = {}
         for datapackage_number, datapackage in enumerate(self.datapackages):
-            external_scenario_regions[datapackage_number] = self.external_scenarios_data[datapackage_number]["regions"]
+            external_scenario_regions[datapackage_number] = (
+                self.external_scenarios_data[datapackage_number]["regions"]
+            )
 
         self.configurations = configurations or []
 
-
         for d, data in self.external_scenarios_data.items():
             ds_names = get_recursively(self.configurations[d], "name")
             self.regionalize_inventories(ds_names, external_scenario_regions[d], data)
diff --git a/premise/pathways.py b/premise/pathways.py
index 140be83d..b5b3b728 100644
--- a/premise/pathways.py
+++ b/premise/pathways.py
@@ -302,14 +302,14 @@ def add_scenario_data(self):
                     data = xr.concat(
                         [
                             data,
-                            external["production volume"].interp(
-                                year=scenario["year"]
-                            ),
+                            external["production volume"].interp(year=scenario["year"]),
                         ],
                         dim="variables",
                     )
                     extra_units.update(external["production volume"].attrs["unit"])
-                    scenario_name += f" - {scenario['external scenarios'][ext]['scenario']}"
+                    scenario_name += (
+                        f" - {scenario['external scenarios'][ext]['scenario']}"
+                    )
 
             # add a scenario dimension
             data = data.expand_dims("scenario")