Don't include Nested in __all__ twice
@@ -23,7 +23,7 @@ import marshmallow as ma
from marshmallow.fields import * # noqa: F40
from webargs.dict2schema import dict2schema
-__all__ = ["Nested", "DelimitedList"] + ma.fields.__all__
+__all__ = ["DelimitedList"] + ma.fields.__all__
class Nested(ma.fields.Nested):
