---
title: testCallString
description: Test request. Returns back received string
---
## Method: testCallString  
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YOU CANNOT USE THIS METHOD IN MADELINEPROTO


Test request. Returns back received string

### Params:

| Name     |    Type       | Required | Description |
|----------|---------------|----------|-------------|
|x|[string](../types/string.md) | Yes|String to return|


### Return type: [TestString](../types/TestString.md)