diff --git a/docarray/array/storage/sqlite/backend.py b/docarray/array/storage/sqlite/backend.py
index 4332467c964..fe9627be194 100644
--- a/docarray/array/storage/sqlite/backend.py
+++ b/docarray/array/storage/sqlite/backend.py
@@ -34,7 +34,7 @@ def _sanitize_table_name(table_name: str) -> str:
 class SqliteConfig:
     connection: Optional[Union[str, 'sqlite3.Connection']] = None
     table_name: Optional[str] = None
-    serialize_config: Dict = field(default_factory=lambda: {'protocol': 'protobuf'})
+    serialize_config: Dict = field(default_factory=dict)
     conn_config: Dict = field(default_factory=dict)
     journal_mode: str = 'DELETE'
     synchronous: str = 'OFF'
diff --git a/docarray/array/storage/weaviate/backend.py b/docarray/array/storage/weaviate/backend.py
index 07a0e642636..df08cef46d7 100644
--- a/docarray/array/storage/weaviate/backend.py
+++ b/docarray/array/storage/weaviate/backend.py
@@ -33,7 +33,7 @@ class WeaviateConfig:
     client: Optional[Union[str, weaviate.Client]] = None
     n_dim: Optional[int] = None
     name: Optional[str] = None
-    serialize_config: Dict = field(default_factory=lambda: {'protocol': 'protobuf'})
+    serialize_config: Dict = field(default_factory=dict)
 
 
 class BackendMixin(BaseBackendMixin):
diff --git a/tests/unit/array/mixins/test_embed.py b/tests/unit/array/mixins/test_embed.py
index b453fc39c9d..0ae985e1650 100644
--- a/tests/unit/array/mixins/test_embed.py
+++ b/tests/unit/array/mixins/test_embed.py
@@ -43,7 +43,7 @@
 )
 
 
-@pytest.mark.parametrize('framework', ['onnx', 'keras', 'pytorch', 'paddle'])
+@pytest.mark.parametrize('framework', ['onnx', 'keras', 'pytorch'])
 @pytest.mark.parametrize(
     'da', [DocumentArray, DocumentArraySqlite, DocumentArrayWeaviate]
 )