diff --git a/examples/cpf_digit.py b/examples/cpf_digit.py
index e33b513..3a68653 100644
--- a/examples/cpf_digit.py
+++ b/examples/cpf_digit.py
@@ -1,4 +1,4 @@
-""" Example of rule to get the eighth digit of a CPF."""
+"""Example of rule to get the eighth digit of a CPF."""
 
 import retrack
 import pandas as pd
diff --git a/retrack/nodes/base.py b/retrack/nodes/base.py
index e53ed23..5977c39 100644
--- a/retrack/nodes/base.py
+++ b/retrack/nodes/base.py
@@ -81,12 +81,12 @@ class InputConnectionModel(pydantic.BaseModel):
 class BaseNode(pydantic.BaseModel):
     id: CastedToStringType
     name: str
-    inputs: typing.Optional[
-        typing.Dict[CastedToStringType, InputConnectionModel]
-    ] = None
-    outputs: typing.Optional[
-        typing.Dict[CastedToStringType, OutputConnectionModel]
-    ] = None
+    inputs: typing.Optional[typing.Dict[CastedToStringType, InputConnectionModel]] = (
+        None
+    )
+    outputs: typing.Optional[typing.Dict[CastedToStringType, OutputConnectionModel]] = (
+        None
+    )
 
     def run(self, **kwargs) -> typing.Dict[str, typing.Any]:
         return {}
diff --git a/tests/test_engine/test_conditional_connector_rule.py b/tests/test_engine/test_conditional_connector_rule.py
index 7981854..a68daaf 100644
--- a/tests/test_engine/test_conditional_connector_rule.py
+++ b/tests/test_engine/test_conditional_connector_rule.py
@@ -6,7 +6,11 @@
 import pandas as pd
 import pytest
 
-VALUES = {"qtd_sinistros_rcf": 1, "qtd_sinistros_indefinido": 10, "is_defendant_and_court_type": False}
+VALUES = {
+    "qtd_sinistros_rcf": 1,
+    "qtd_sinistros_indefinido": 10,
+    "is_defendant_and_court_type": False,
+}
 
 
 def bureau_connector_factory(
@@ -24,11 +28,13 @@ def run(
                     raise ValueError(
                         f"Missing input {in_node_key} in BureauConnector node"
                     )
-                
+
                 if node_inputs[in_node_key].empty:
                     return {"output_value": None}
 
-                parsed_inputs[self.data.headers[i]] = node_inputs[in_node_key].to_list()[0]
+                parsed_inputs[self.data.headers[i]] = node_inputs[
+                    in_node_key
+                ].to_list()[0]
 
             return {"output_value": VALUES[self.data.resource]}
 
@@ -68,4 +74,4 @@ def test_bureau_connector_factory(
 
     result = rule_executor.execute(df, raise_raw_exception=True)
     assert result["output"].to_list()[0] == expected_result
-    assert result["message"].to_list()[0] == expected_message
\ No newline at end of file
+    assert result["message"].to_list()[0] == expected_message