---
title: "FIX 5.0 SP2 EP299: TestRequest <1> message – FIX Dictionary – Onix Solutions"
description: "<meta name=\"description\" content=\"TestRequest&lt;1&gt; message &ndash; FIX 5.0 SP2 EP299, FIX protocol version FIX 5.0 SP2 EP299\" /> <meta name=\"keywords\" content=\"message, TestRequest, MsgType=1, FIX 5.0 SP2 EP299, FIX Protocol, FIX dictionary\" />"
---

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# TestRequest <1> message

## FIX 5.0 SP2 EP299

### Description

 The test request message forces a heartbeat from the opposing application. The test request message checks sequence numbers or verifies communication line status. The opposite application responds to the Test Request with a [Heartbeat <0>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_0_0.html) containing the [TestReqID <112>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_112.html).

 The TestReqID verifies that the opposite application is generating the heartbeat as the result of Test Request and not a normal timeout. The opposite application includes the TestReqID in the resulting Heartbeat. Any string can be used as the TestReqID (one suggestion is to use a timestamp string).

### Structure

| Tag | Field Name | Req'd | Comments |
| --- | --- | --- | --- |
| [Component Block - <StandardHeader>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_StandardHeader.html) | Y | [MsgType <35>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_35.html) = 1 |  |
| 112 | [TestReqID](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_112.html) | Y |  |
| [Component Block - <StandardTrailer>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_StandardTrailer.html) | Y |  |  |

### Sample Messages

 The `^` character is used to represent [`SOH`](https://en.wikipedia.org/wiki/C0_and_C1_control_codes#SOH) character.

```

8=FIXT.1.1^9=79^35=1^49=BuySide^56=SellSide^34=2^52=20190605-17:05:37.187^1128=9^112=TestReqID^10=110^
```

### Related Messages

- [Heartbeat <0>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_0_0.html)

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