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 21e5dd1627..b11f4f7957 100644
--- a/radio/1.2/vts/functional/radio_hidl_hal_api.cpp
+++ b/radio/1.2/vts/functional/radio_hidl_hal_api.cpp
@@ -682,7 +682,7 @@ 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);
@@ -700,7 +700,7 @@ 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);
@@ -718,7 +718,7 @@ 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);
@@ -737,7 +737,7 @@ 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);