diff --git a/wifi/supplicant/1.0/vts/functional/supplicant_hidl_test_utils.cpp b/wifi/supplicant/1.0/vts/functional/supplicant_hidl_test_utils.cpp
index da3996b80e..be6aad9583 100644
--- a/wifi/supplicant/1.0/vts/functional/supplicant_hidl_test_utils.cpp
+++ b/wifi/supplicant/1.0/vts/functional/supplicant_hidl_test_utils.cpp
@@ -52,6 +52,10 @@ namespace {
 // Helper function to initialize the driver and firmware to STA mode
 // using the vendor HAL HIDL interface.
 void initilializeDriverAndFirmware(const std::string& wifi_instance_name) {
+    // Skip if wifi instance is not set.
+    if (wifi_instance_name == "") {
+        return;
+    }
     if (getWifi(wifi_instance_name) != nullptr) {
         sp<IWifiChip> wifi_chip = getWifiChip(wifi_instance_name);
         ChipModeId mode_id;
@@ -65,6 +69,10 @@ void initilializeDriverAndFirmware(const std::string& wifi_instance_name) {
 // Helper function to deinitialize the driver and firmware
 // using the vendor HAL HIDL interface.
 void deInitilializeDriverAndFirmware(const std::string& wifi_instance_name) {
+    // Skip if wifi instance is not set.
+    if (wifi_instance_name == "") {
+        return;
+    }
     if (getWifi(wifi_instance_name) != nullptr) {
         stopWifi(wifi_instance_name);
     } else {
diff --git a/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test.cpp b/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test.cpp
index 3c4d06b107..8d7ea54b3c 100644
--- a/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test.cpp
+++ b/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test.cpp
@@ -33,6 +33,7 @@ using ::android::hardware::wifi::supplicant::V1_0::SupplicantStatus;
 using ::android::hardware::wifi::supplicant::V1_0::SupplicantStatusCode;
 using ::android::hardware::wifi::supplicant::V1_0::IfaceType;
 using ::android::hardware::wifi::supplicant::V1_1::ISupplicant;
+using ::android::hardware::wifi::V1_0::IWifi;
 using ::android::sp;
 
 class SupplicantHidlTest : public SupplicantHidlTestBaseV1_1 {
@@ -139,21 +140,12 @@ TEST_P(SupplicantHidlTest, RemoveP2pInterface) {
  */
 TEST_P(SupplicantHidlTest, Terminate) { supplicant_->terminate(); }
 
-static std::vector<std::string> get_wifi_instances() {
-    std::vector<std::string> instances =
-        android::hardware::getAllHalInstanceNames(
-            android::hardware::wifi::V1_0::IWifi::descriptor);
-    // Also test when wifi instance is not set.
-    instances.push_back("");
-
-    return instances;
-}
-
 GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(SupplicantHidlTest);
 INSTANTIATE_TEST_CASE_P(
     PerInstance, SupplicantHidlTest,
     testing::Combine(
-        testing::ValuesIn(get_wifi_instances()),
+        testing::ValuesIn(
+            android::hardware::getAllHalInstanceNames(IWifi::descriptor)),
         testing::ValuesIn(android::hardware::getAllHalInstanceNames(
             android::hardware::wifi::supplicant::V1_1::ISupplicant::
                 descriptor))),