# CustomPersister

> **Class** in `langchain_tests`

📖 [View in docs](https://reference.langchain.com/python/langchain-tests/conftest/CustomPersister)

A custom persister for VCR that uses the `CustomSerializer`.

## Signature

```python
CustomPersister()
```

## Methods

- [`load_cassette()`](https://reference.langchain.com/python/langchain-tests/conftest/CustomPersister/load_cassette)
- [`save_cassette()`](https://reference.langchain.com/python/langchain-tests/conftest/CustomPersister/save_cassette)

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/f0c5a28fa05adcda89aebcb449d897245ab21fa4/libs/standard-tests/langchain_tests/conftest.py#L55)