diff --git a/packages/abstractions/kiota_abstractions/serialization/parse_node_helper.py b/packages/abstractions/kiota_abstractions/serialization/parse_node_helper.py
index 388a7e4..a1b073b 100644
--- a/packages/abstractions/kiota_abstractions/serialization/parse_node_helper.py
+++ b/packages/abstractions/kiota_abstractions/serialization/parse_node_helper.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Callable, Dict
+from typing import TYPE_CHECKING, Callable, Dict, Optional
 
 if TYPE_CHECKING:
     from . import Parsable, ParseNode
@@ -10,7 +10,7 @@ class ParseNodeHelper:
 
     @staticmethod
     def merge_deserializers_for_intersection_wrapper(
-        *targets: Parsable
+        *targets: Optional[Parsable]
     ) -> Dict[str, Callable[[ParseNode], None]]:
         """Merges a collection of parsable field deserializers into a single collection.
 
diff --git a/packages/abstractions/kiota_abstractions/serialization/serialization_writer.py b/packages/abstractions/kiota_abstractions/serialization/serialization_writer.py
index c6a0ef5..db0489b 100644
--- a/packages/abstractions/kiota_abstractions/serialization/serialization_writer.py
+++ b/packages/abstractions/kiota_abstractions/serialization/serialization_writer.py
@@ -158,7 +158,7 @@ def write_bytes_value(self, key: Optional[str], value: Optional[bytes]) -> None:
 
     @abstractmethod
     def write_object_value(
-        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[List[U]]
+        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[U]
     ) -> None:
         """Writes the specified model object to the stream with an optional given key.
 
diff --git a/packages/serialization/form/kiota_serialization_form/form_serialization_writer.py b/packages/serialization/form/kiota_serialization_form/form_serialization_writer.py
index dc1d34a..c7dd5dc 100644
--- a/packages/serialization/form/kiota_serialization_form/form_serialization_writer.py
+++ b/packages/serialization/form/kiota_serialization_form/form_serialization_writer.py
@@ -178,7 +178,7 @@ def write_collection_of_object_values(
         raise Exception("Form serialization does not support collections.")
 
     def write_object_value(
-        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[List[U]]
+        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[U]
     ) -> None:
         """Writes the specified model object to the stream with an optional given key.
         Args:
diff --git a/packages/serialization/json/kiota_serialization_json/json_serialization_writer.py b/packages/serialization/json/kiota_serialization_json/json_serialization_writer.py
index 765a608..73453a3 100644
--- a/packages/serialization/json/kiota_serialization_json/json_serialization_writer.py
+++ b/packages/serialization/json/kiota_serialization_json/json_serialization_writer.py
@@ -293,7 +293,7 @@ def write_bytes_value(self, key: Optional[str], value: Optional[bytes]) -> None:
                 self.value = base64_string
 
     def write_object_value(
-        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[List[U]]
+        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[U]
     ) -> None:
         """Writes the specified model object to the stream with an optional given key.
         Args:
diff --git a/packages/serialization/multipart/kiota_serialization_multipart/multipart_serialization_writer.py b/packages/serialization/multipart/kiota_serialization_multipart/multipart_serialization_writer.py
index 995ede5..16f3a5c 100644
--- a/packages/serialization/multipart/kiota_serialization_multipart/multipart_serialization_writer.py
+++ b/packages/serialization/multipart/kiota_serialization_multipart/multipart_serialization_writer.py
@@ -160,7 +160,7 @@ def write_collection_of_object_values(
         raise NotImplementedError()
 
     def write_object_value(
-        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[List[U]]
+        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[U]
     ) -> None:
         """Writes the specified model object to the stream with an optional given key.
         Args:
diff --git a/packages/serialization/text/kiota_serialization_text/text_serialization_writer.py b/packages/serialization/text/kiota_serialization_text/text_serialization_writer.py
index 267252d..db7a760 100644
--- a/packages/serialization/text/kiota_serialization_text/text_serialization_writer.py
+++ b/packages/serialization/text/kiota_serialization_text/text_serialization_writer.py
@@ -159,7 +159,7 @@ def write_bytes_value(self, key: Optional[str], value: Optional[bytes]) -> None:
             self.write_str_value(key, base64_string)
 
     def write_object_value(
-        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[List[U]]
+        self, key: Optional[str], value: Optional[U], *additional_values_to_merge: Optional[U]
     ) -> None:
         """Writes the specified model object to the stream with an optional given key.
         Args:
diff --git a/tests/validation/pyproject.toml b/tests/validation/pyproject.toml
index 866fd27..0e3d8c9 100644
--- a/tests/validation/pyproject.toml
+++ b/tests/validation/pyproject.toml
@@ -5,6 +5,7 @@ build-backend = "poetry.core.masonry.api"
 [tool.poetry]
 name = "validation-client"
 version = "1.3.4"
+package-mode = false
 description = "Core abstractions for kiota generated libraries in Python"
 authors = ["Microsoft <graphtooling+python@microsoft.com>"]
 license = "MIT"