diff --git a/interface_tester/interface_test.py b/interface_tester/interface_test.py
index 86144c2..4c013a1 100644
--- a/interface_tester/interface_test.py
+++ b/interface_tester/interface_test.py
@@ -297,7 +297,7 @@ def assert_schema_valid(self, schema: Optional["DataBagSchema"] = None):
                     {
                         "unit": relation.local_unit_data,
                         "app": relation.local_app_data,
-                    }
+                    },
                 )
             except ValidationError as e:
                 errors.append(str(e))
@@ -451,7 +451,7 @@ def _get_endpoint(supported_endpoints: dict, role: Role, interface_name: str):
         return endpoints_for_interface[0]
 
     def _generate_relations_state(
-            self, state_template: State, input_state: State, supported_endpoints, role: Role
+        self, state_template: State, input_state: State, supported_endpoints, role: Role
     ) -> List[Relation]:
         """Merge the relations from the input state and the state template into one.
 
diff --git a/tests/unit/test_collect_schemas.py b/tests/unit/test_collect_schemas.py
index 5e97a1d..7357da4 100644
--- a/tests/unit/test_collect_schemas.py
+++ b/tests/unit/test_collect_schemas.py
@@ -3,12 +3,12 @@
 
 import pytest
 
-from interface_tester.interface_test import _has_pydantic_v1
 from interface_tester.collector import (
     collect_tests,
     get_schema_from_module,
     load_schema_module,
 )
+from interface_tester.interface_test import _has_pydantic_v1
 
 
 def test_load_schema_module(tmp_path):
@@ -76,8 +76,12 @@ class RequirerSchema(DataBagSchema):
         assert tests["mytestinterfaceb"]["v0"]["requirer"]["schema"].__fields__["foo"].default == 2
 
     else:
-        assert tests["mytestinterfacea"]["v0"]["requirer"]["schema"].model_fields["foo"].default == 1
-        assert tests["mytestinterfaceb"]["v0"]["requirer"]["schema"].model_fields["foo"].default == 2
+        assert (
+            tests["mytestinterfacea"]["v0"]["requirer"]["schema"].model_fields["foo"].default == 1
+        )
+        assert (
+            tests["mytestinterfaceb"]["v0"]["requirer"]["schema"].model_fields["foo"].default == 2
+        )
 
 
 def test_collect_invalid_schemas(tmp_path):