diff --git a/tests/dsp/firmware_update.cpp b/tests/dsp/firmware_update.cpp
index 78f81db..7c406aa 100644
--- a/tests/dsp/firmware_update.cpp
+++ b/tests/dsp/firmware_update.cpp
@@ -2284,7 +2284,7 @@
     constexpr uint8_t instanceId = 1;
     // Setup invalid transfer operation flag
     constexpr pldm_get_downstream_firmware_parameters_req params_req{
-        0x0, PLDM_ACKNOWLEDGEMENT_ONLY};
+        0x0, PLDM_GET_FIRSTPART};
     constexpr size_t payload_length =
         PLDM_GET_DOWNSTREAM_FIRMWARE_PARAMETERS_REQ_BYTES -
         1 /* inject erro length*/;