diff --git a/sqlalchemy_bigquery/base.py b/sqlalchemy_bigquery/base.py
index 65accf58..1d65d166 100644
--- a/sqlalchemy_bigquery/base.py
+++ b/sqlalchemy_bigquery/base.py
@@ -1070,7 +1070,10 @@ def __init__(self, *args, **kwargs):
         if isinstance(arg, sqlalchemy.sql.expression.ColumnElement):
             if not (
                 isinstance(arg.type, sqlalchemy.sql.sqltypes.ARRAY)
-                or (hasattr(arg.type, "impl") and isinstance(arg.type.impl, sqlalchemy.sql.sqltypes.ARRAY))
+                or (
+                    hasattr(arg.type, "impl")
+                    and isinstance(arg.type.impl, sqlalchemy.sql.sqltypes.ARRAY)
+                )
             ):
                 raise TypeError("The argument to unnest must have an ARRAY type.")
             self.type = arg.type.item_type
diff --git a/sqlalchemy_bigquery/requirements.py b/sqlalchemy_bigquery/requirements.py
index 59b87b66..7254cfaf 100644
--- a/sqlalchemy_bigquery/requirements.py
+++ b/sqlalchemy_bigquery/requirements.py
@@ -136,11 +136,11 @@ def schemas(self):
         named 'test_schema'."""
 
         return unsupported()
-    
+
     @property
     def array_type(self):
         return only_on([lambda config: against(config, "postgresql")])
-    
+
     @property
     def uuid_data_type(self):
         """Return databases that support the UUID datatype."""