# How to mock ElasticsearchServerError?

**URL:** <https://discuss.elastic.co/t/how-to-mock-elasticsearchservererror/382193>\
**Category:** Elasticsearch\
**Created:** [September 24, 2025, 9:23am UTC](https://discuss.elastic.co/t/how-to-mock-elasticsearchservererror/382193 "2025-09-24T09:23:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![vedavathy](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@vedavathy](https://discuss.elastic.co/u/vedavathy)\
**Post date:** [September 24, 2025, 9:23am UTC](https://discuss.elastic.co/t/how-to-mock-elasticsearchservererror/382193/1 "2025-09-24T09:23:21Z")

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Hello,

I am using .NET 8 and "Elastic.Clients.Elasticsearch" Version="8.13.2"

Trying to mock test data for ElasticsearchServerError. As its a sealed class we can’t use Moq and dont want to create wrapper class. Do we have something like TestableResponseFactory for ElasticsearchServerError?