diff --git a/libpldm/tests/libpldm_firmware_update_test.cpp b/libpldm/tests/libpldm_firmware_update_test.cpp
index 8387b77..489be16 100644
--- a/libpldm/tests/libpldm_firmware_update_test.cpp
+++ b/libpldm/tests/libpldm_firmware_update_test.cpp
@@ -20,3 +20,45 @@
     EXPECT_EQ(requestPtr->hdr.type, PLDM_FWUP);
     EXPECT_EQ(requestPtr->hdr.command, PLDM_QUERY_DEVICE_IDENTIFIERS);
 }
+
+TEST(QueryDeviceIdentifiers, goodPathDecodeResponse)
+{
+    // descriptorDataLen is not fixed here taking it as 6
+    constexpr uint8_t descriptorDataLen = 6;
+    std::array<uint8_t, hdrSize +
+                            sizeof(struct pldm_query_device_identifiers_resp) +
+                            descriptorDataLen>
+        responseMsg{};
+    auto inResp = reinterpret_cast<struct pldm_query_device_identifiers_resp*>(
+        responseMsg.data() + hdrSize);
+
+    inResp->completion_code = PLDM_SUCCESS;
+    inResp->device_identifiers_len = htole32(descriptorDataLen);
+    inResp->descriptor_count = 1;
+
+    // filling descriptor data
+    std::fill_n(responseMsg.data() + hdrSize +
+                    sizeof(struct pldm_query_device_identifiers_resp),
+                descriptorDataLen, 0xFF);
+
+    auto response = reinterpret_cast<pldm_msg*>(responseMsg.data());
+    uint8_t completionCode = PLDM_SUCCESS;
+    uint32_t deviceIdentifiersLen = 0;
+    uint8_t descriptorCount = 0;
+    uint8_t* outDescriptorData = nullptr;
+
+    auto rc = decode_query_device_identifiers_resp(
+        response, responseMsg.size() - hdrSize, &completionCode,
+        &deviceIdentifiersLen, &descriptorCount, &outDescriptorData);
+
+    EXPECT_EQ(rc, PLDM_SUCCESS);
+    EXPECT_EQ(completionCode, PLDM_SUCCESS);
+    EXPECT_EQ(deviceIdentifiersLen, inResp->device_identifiers_len);
+    EXPECT_EQ(descriptorCount, inResp->descriptor_count);
+    EXPECT_EQ(true,
+              std::equal(outDescriptorData,
+                         outDescriptorData + deviceIdentifiersLen,
+                         responseMsg.begin() + hdrSize +
+                             sizeof(struct pldm_query_device_identifiers_resp),
+                         responseMsg.end()));
+}