The Test Request <1> message forces a heartbeat from the opposing application in order to verify the FIX session status; upon receiving receipt of a Test Request, the recipient should reply with a Heartbeat message stating the corresponding TestReqID.
| Tag | Field Name | Data Type | Req’d | Comments |
|---|---|---|---|---|
| Standard header | Y | MsgType 35=1 | ||
| 112 | TestReqID | string | Y | Identifier to be returned in the resulting Heartbeat. |
| Standard trailer | Y |