# RetrieversIntegrationTests

> **Class** in `langchain_tests`

📖 [View in docs](https://reference.langchain.com/python/langchain-tests/integration_tests/retrievers/RetrieversIntegrationTests)

Base class for retrievers integration tests.

## Signature

```python
RetrieversIntegrationTests()
```

## Extends

- `BaseStandardTests`

## Properties

- `retriever_constructor`
- `retriever_constructor_params`
- `retriever_query_example`
- `num_results_arg_name`

## Methods

- [`retriever()`](https://reference.langchain.com/python/langchain-tests/integration_tests/retrievers/RetrieversIntegrationTests/retriever)
- [`test_k_constructor_param()`](https://reference.langchain.com/python/langchain-tests/integration_tests/retrievers/RetrieversIntegrationTests/test_k_constructor_param)
- [`test_invoke_with_k_kwarg()`](https://reference.langchain.com/python/langchain-tests/integration_tests/retrievers/RetrieversIntegrationTests/test_invoke_with_k_kwarg)
- [`test_invoke_returns_documents()`](https://reference.langchain.com/python/langchain-tests/integration_tests/retrievers/RetrieversIntegrationTests/test_invoke_returns_documents)
- [`test_ainvoke_returns_documents()`](https://reference.langchain.com/python/langchain-tests/integration_tests/retrievers/RetrieversIntegrationTests/test_ainvoke_returns_documents)

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/8fec4e7ceee2c368b068c49f9fed453276e210e7/libs/standard-tests/langchain_tests/integration_tests/retrievers.py#L13)