test: fix unit test

Author: fbozhang

tests/test_serializer_nested.py

@@ -199,14 +199,14 @@ def test_nested_serializer_with_list_json(self):
         serializer = self.Serializer(data=input_data)
 
         assert serializer.is_valid()
-        assert serializer.validated_data['nested']['example'] == {1, 2}
+        assert serializer.validated_data['nested']['example'] == [1, 2]
 
     def test_nested_serializer_with_list_multipart(self):
         input_data = QueryDict('nested.example=1&nested.example=2')
         serializer = self.Serializer(data=input_data)
 
         assert serializer.is_valid()
-        assert serializer.validated_data['nested']['example'] == {1, 2}
+        assert serializer.validated_data['nested']['example'] == [1, 2]
 
 
 class TestNotRequiredNestedSerializerWithMany: