diff --git a/radio/1.2/vts/functional/radio_hidl_hal_api.cpp b/radio/1.2/vts/functional/radio_hidl_hal_api.cpp
index 212913d3ac..a9865e53de 100644
--- a/radio/1.2/vts/functional/radio_hidl_hal_api.cpp
+++ b/radio/1.2/vts/functional/radio_hidl_hal_api.cpp
@@ -696,7 +696,7 @@ TEST_F(RadioHidlTest_v1_2, deactivateDataCall_1_2) {
  * Test IRadio.getCellInfoList() for the response returned.
  */
 TEST_F(RadioHidlTest_v1_2, getCellInfoList_1_2) {
-    int serial = GetRandomSerialNumber();
+    serial = GetRandomSerialNumber();
 
     Return<void> res = radio_v1_2->getCellInfoList(serial);
     ASSERT_OK(res);
@@ -714,7 +714,7 @@ TEST_F(RadioHidlTest_v1_2, getCellInfoList_1_2) {
  * Test IRadio.getVoiceRegistrationState() for the response returned.
  */
 TEST_F(RadioHidlTest_v1_2, getVoiceRegistrationState) {
-    int serial = GetRandomSerialNumber();
+    serial = GetRandomSerialNumber();
 
     Return<void> res = radio_v1_2->getVoiceRegistrationState(serial);
     ASSERT_OK(res);
@@ -732,7 +732,7 @@ TEST_F(RadioHidlTest_v1_2, getVoiceRegistrationState) {
  * Test IRadio.getDataRegistrationState() for the response returned.
  */
 TEST_F(RadioHidlTest_v1_2, getDataRegistrationState) {
-    int serial = GetRandomSerialNumber();
+    serial = GetRandomSerialNumber();
 
     Return<void> res = radio_v1_2->getDataRegistrationState(serial);
     ASSERT_OK(res);
@@ -751,7 +751,7 @@ TEST_F(RadioHidlTest_v1_2, getDataRegistrationState) {
  * Test IRadio.getAvailableBandModes() for the response returned.
  */
 TEST_F(RadioHidlTest_v1_2, getAvailableBandModes) {
-    int serial = GetRandomSerialNumber();
+    serial = GetRandomSerialNumber();
 
     Return<void> res = radio_v1_2->getAvailableBandModes(serial);
     ASSERT_OK(res);