diff --git a/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test.cpp b/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test.cpp
index fa780f9..6dc9eb4 100644
--- a/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test.cpp
+++ b/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test.cpp
@@ -41,6 +41,7 @@
 class HostapdHidlTest : public ::testing::VtsHalHidlTargetTestBase {
    public:
     virtual void SetUp() override {
+        stopSupplicantIfNeeded();
         startHostapdAndWaitForHidlService();
         hostapd_ = getHostapd();
         ASSERT_NE(hostapd_.get(), nullptr);
diff --git a/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test_utils.cpp b/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test_utils.cpp
index 22dbb52..1c499e7 100644
--- a/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test_utils.cpp
+++ b/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test_utils.cpp
@@ -23,24 +23,26 @@
 
 #include <wifi_system/hostapd_manager.h>
 #include <wifi_system/interface_tool.h>
+#include <wifi_system/supplicant_manager.h>
 
 #include "hostapd_hidl_test_utils.h"
 #include "wifi_hidl_test_utils.h"
 
 using ::android::sp;
 using ::android::hardware::configureRpcThreadpool;
-using ::android::hardware::joinRpcThreadpool;
 using ::android::hardware::hidl_string;
 using ::android::hardware::hidl_vec;
+using ::android::hardware::joinRpcThreadpool;
 using ::android::hardware::Return;
 using ::android::hardware::Void;
-using ::android::hardware::wifi::V1_0::ChipModeId;
-using ::android::hardware::wifi::V1_0::IWifiChip;
-using ::android::hardware::wifi::hostapd::V1_0::IHostapd;
 using ::android::hardware::wifi::hostapd::V1_0::HostapdStatus;
 using ::android::hardware::wifi::hostapd::V1_0::HostapdStatusCode;
+using ::android::hardware::wifi::hostapd::V1_0::IHostapd;
+using ::android::hardware::wifi::V1_0::ChipModeId;
+using ::android::hardware::wifi::V1_0::IWifiChip;
 using ::android::hidl::manager::V1_0::IServiceNotification;
 using ::android::wifi_system::HostapdManager;
+using ::android::wifi_system::SupplicantManager;
 
 extern WifiHostapdHidlEnvironment* gEnv;
 
@@ -108,6 +110,16 @@
     std::condition_variable condition_;
 };
 
+void stopSupplicantIfNeeded() {
+    SupplicantManager supplicant_manager;
+    if (supplicant_manager.IsSupplicantRunning()) {
+        LOG(INFO) << "Supplicant is running, stop supplicant first.";
+        ASSERT_TRUE(supplicant_manager.StopSupplicant());
+        deInitilializeDriverAndFirmware();
+        ASSERT_FALSE(supplicant_manager.IsSupplicantRunning());
+    }
+}
+
 void stopHostapd() {
     HostapdManager hostapd_manager;
 
diff --git a/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test_utils.h b/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test_utils.h
index 8e2f1a3..9b3df42 100644
--- a/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test_utils.h
+++ b/wifi/hostapd/1.0/vts/functional/hostapd_hidl_test_utils.h
@@ -25,6 +25,7 @@
 // Used to stop the android wifi framework before every test.
 void stopWifiFramework();
 void startWifiFramework();
+void stopSupplicantIfNeeded();
 void stopHostapd();
 // Used to configure the chip, driver and start wpa_hostapd before every
 // test.
diff --git a/wifi/hostapd/1.1/vts/functional/hostapd_hidl_test.cpp b/wifi/hostapd/1.1/vts/functional/hostapd_hidl_test.cpp
index 439a624..26a58b2 100644
--- a/wifi/hostapd/1.1/vts/functional/hostapd_hidl_test.cpp
+++ b/wifi/hostapd/1.1/vts/functional/hostapd_hidl_test.cpp
@@ -45,6 +45,7 @@
 class HostapdHidlTest : public ::testing::VtsHalHidlTargetTestBase {
    public:
     virtual void SetUp() override {
+        stopSupplicantIfNeeded();
         startHostapdAndWaitForHidlService();
         hostapd_ = getHostapd_1_1();
         ASSERT_NE(hostapd_.get(), nullptr);