--- title: testCallBytes description: Test request. Returns back received bytes --- ## Method: testCallBytes [Back to methods index](index.md) YOU CANNOT USE THIS METHOD IN MADELINEPROTO Test request. Returns back received bytes ### Parameters: | Name | Type | Required | Description | |----------|---------------|----------|-------------| |x|[bytes](../types/bytes.md) | Yes|Bytes to return| ### Return type: [TestBytes](../types/TestBytes.md)