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


Test request. Returns back received bytes

### Params:

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


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