diff --git a/tests/libpldm_platform_test.cpp b/tests/libpldm_platform_test.cpp
index 58242fb6a..2c2eae689 100644
--- a/tests/libpldm_platform_test.cpp
+++ b/tests/libpldm_platform_test.cpp
@@ -842,7 +842,7 @@ TEST(GetStateSensorReadings, testBadDecodeResponse)
            (sizeof(get_sensor_state_field) * comp_sensorCnt));
 
     rc = decode_get_state_sensor_readings_resp(
-        response, responseMsg.size() - hdrSize + 1, &retcompletion_code,
+        response, responseMsg.size() - hdrSize, &retcompletion_code,
         &retcomp_sensorCnt, retstateField.data());
 
     EXPECT_EQ(rc, PLDM_ERROR_INVALID_LENGTH);