diff --git a/wifi/1.0/vts/functional/wifi_chip_hidl_test.cpp b/wifi/1.0/vts/functional/wifi_chip_hidl_test.cpp
index ec96fcf..62874ef 100644
--- a/wifi/1.0/vts/functional/wifi_chip_hidl_test.cpp
+++ b/wifi/1.0/vts/functional/wifi_chip_hidl_test.cpp
@@ -543,12 +543,16 @@
 
     const auto& status_and_rtt_controller =
         HIDL_INVOKE(wifi_chip_, createRttController, iface);
-    EXPECT_EQ(WifiStatusCode::SUCCESS, status_and_rtt_controller.first.code);
-    EXPECT_NE(nullptr, status_and_rtt_controller.second.get());
+    if (status_and_rtt_controller.first.code !=
+        WifiStatusCode::ERROR_NOT_SUPPORTED) {
+        EXPECT_EQ(WifiStatusCode::SUCCESS,
+                  status_and_rtt_controller.first.code);
+        EXPECT_NE(nullptr, status_and_rtt_controller.second.get());
+    }
 }
 
 INSTANTIATE_TEST_SUITE_P(
     PerInstance, WifiChipHidlTest,
     testing::ValuesIn(
         android::hardware::getAllHalInstanceNames(IWifi::descriptor)),
-    android::hardware::PrintInstanceNameToString);
\ No newline at end of file
+    android::hardware::PrintInstanceNameToString);
diff --git a/wifi/1.0/vts/functional/wifi_hidl_test_utils.cpp b/wifi/1.0/vts/functional/wifi_hidl_test_utils.cpp
index d584d4b..26e4821 100644
--- a/wifi/1.0/vts/functional/wifi_hidl_test_utils.cpp
+++ b/wifi/1.0/vts/functional/wifi_hidl_test_utils.cpp
@@ -209,23 +209,6 @@
     return status_and_iface.second;
 }
 
-sp<IWifiRttController> getWifiRttController(const std::string& instance_name) {
-    sp<IWifiChip> wifi_chip = getWifiChip(instance_name);
-    if (!wifi_chip.get()) {
-        return nullptr;
-    }
-    sp<IWifiStaIface> wifi_sta_iface = getWifiStaIface(instance_name);
-    if (!wifi_sta_iface.get()) {
-        return nullptr;
-    }
-    const auto& status_and_controller =
-        HIDL_INVOKE(wifi_chip, createRttController, wifi_sta_iface);
-    if (status_and_controller.first.code != WifiStatusCode::SUCCESS) {
-        return nullptr;
-    }
-    return status_and_controller.second;
-}
-
 bool configureChipToSupportIfaceType(const sp<IWifiChip>& wifi_chip,
                                      IfaceType type,
                                      ChipModeId* configured_mode_id) {
diff --git a/wifi/1.0/vts/functional/wifi_hidl_test_utils.h b/wifi/1.0/vts/functional/wifi_hidl_test_utils.h
index bdee2ec..8660134 100644
--- a/wifi/1.0/vts/functional/wifi_hidl_test_utils.h
+++ b/wifi/1.0/vts/functional/wifi_hidl_test_utils.h
@@ -44,8 +44,6 @@
     const std::string& instance_name = "");
 android::sp<android::hardware::wifi::V1_0::IWifiStaIface> getWifiStaIface(
     const std::string& instance_name = "");
-android::sp<android::hardware::wifi::V1_0::IWifiRttController>
-getWifiRttController(const std::string& instance_name = "");
 // Configure the chip in a mode to support the creation of the provided
 // iface type.
 bool configureChipToSupportIfaceType(
diff --git a/wifi/1.0/vts/functional/wifi_rtt_controller_hidl_test.cpp b/wifi/1.0/vts/functional/wifi_rtt_controller_hidl_test.cpp
index e1ee34f..6c01995 100644
--- a/wifi/1.0/vts/functional/wifi_rtt_controller_hidl_test.cpp
+++ b/wifi/1.0/vts/functional/wifi_rtt_controller_hidl_test.cpp
@@ -22,11 +22,15 @@
 #include <hidl/GtestPrinter.h>
 #include <hidl/ServiceManagement.h>
 
+#include "wifi_hidl_call_util.h"
 #include "wifi_hidl_test_utils.h"
 
 using ::android::sp;
 using ::android::hardware::wifi::V1_0::IWifi;
+using ::android::hardware::wifi::V1_0::IWifiChip;
 using ::android::hardware::wifi::V1_0::IWifiRttController;
+using ::android::hardware::wifi::V1_0::IWifiStaIface;
+using ::android::hardware::wifi::V1_0::WifiStatusCode;
 
 /**
  * Fixture to use for all RTT controller HIDL interface tests.
@@ -48,11 +52,26 @@
  */
 TEST_P(WifiRttControllerHidlTest, Create) {
     stopWifi(GetInstanceName());
-    EXPECT_NE(nullptr, getWifiRttController(GetInstanceName()).get());
+
+    const std::string& instance_name = GetInstanceName();
+
+    sp<IWifiChip> wifi_chip = getWifiChip(instance_name);
+    EXPECT_NE(nullptr, wifi_chip.get());
+
+    sp<IWifiStaIface> wifi_sta_iface = getWifiStaIface(instance_name);
+    EXPECT_NE(nullptr, wifi_sta_iface.get());
+
+    const auto& status_and_controller =
+        HIDL_INVOKE(wifi_chip, createRttController, wifi_sta_iface);
+    if (status_and_controller.first.code !=
+        WifiStatusCode::ERROR_NOT_SUPPORTED) {
+        EXPECT_EQ(WifiStatusCode::SUCCESS, status_and_controller.first.code);
+        EXPECT_NE(nullptr, status_and_controller.second.get());
+    }
 }
 
 INSTANTIATE_TEST_SUITE_P(
     PerInstance, WifiRttControllerHidlTest,
     testing::ValuesIn(
         android::hardware::getAllHalInstanceNames(IWifi::descriptor)),
-    android::hardware::PrintInstanceNameToString);
\ No newline at end of file
+    android::hardware::PrintInstanceNameToString);
diff --git a/wifi/1.2/vts/functional/wifi_chip_hidl_test.cpp b/wifi/1.2/vts/functional/wifi_chip_hidl_test.cpp
index 47faec8..93aa0f3 100644
--- a/wifi/1.2/vts/functional/wifi_chip_hidl_test.cpp
+++ b/wifi/1.2/vts/functional/wifi_chip_hidl_test.cpp
@@ -176,11 +176,15 @@
     sp<WifiChipEventCallback> wifiChipEventCallback = new WifiChipEventCallback();
     const auto& status =
         HIDL_INVOKE(wifi_chip_, registerEventCallback_1_2, wifiChipEventCallback);
-    EXPECT_EQ(WifiStatusCode::SUCCESS, status.code);
+
+    if (status.code != WifiStatusCode::SUCCESS) {
+        EXPECT_EQ(WifiStatusCode::ERROR_NOT_SUPPORTED, status.code);
+        return;
+    }
 }
 
 INSTANTIATE_TEST_SUITE_P(
     PerInstance, WifiChipHidlTest,
     testing::ValuesIn(android::hardware::getAllHalInstanceNames(
         ::android::hardware::wifi::V1_2::IWifi::descriptor)),
-    android::hardware::PrintInstanceNameToString);
\ No newline at end of file
+    android::hardware::PrintInstanceNameToString);
diff --git a/wifi/1.2/vts/functional/wifi_nan_iface_hidl_test.cpp b/wifi/1.2/vts/functional/wifi_nan_iface_hidl_test.cpp
index f3f76e1..d5d87ce 100644
--- a/wifi/1.2/vts/functional/wifi_nan_iface_hidl_test.cpp
+++ b/wifi/1.2/vts/functional/wifi_nan_iface_hidl_test.cpp
@@ -481,15 +481,18 @@
     callbackType = INVALID;
     NanEnableRequest nanEnableRequest = {};
     NanConfigRequestSupplemental nanConfigRequestSupp = {};
-    ASSERT_EQ(WifiStatusCode::SUCCESS,
-              HIDL_INVOKE(iwifiNanIface, enableRequest_1_2, inputCmdId,
-                          nanEnableRequest, nanConfigRequestSupp)
-                  .code);
-    // wait for a callback
-    ASSERT_EQ(std::cv_status::no_timeout, wait(NOTIFY_ENABLE_RESPONSE));
-    ASSERT_EQ(NOTIFY_ENABLE_RESPONSE, callbackType);
-    ASSERT_EQ(id, inputCmdId);
-    ASSERT_EQ(status.status, NanStatusType::INVALID_ARGS);
+    const auto& halStatus =
+        HIDL_INVOKE(iwifiNanIface, enableRequest_1_2, inputCmdId,
+                    nanEnableRequest, nanConfigRequestSupp);
+    if (halStatus.code != WifiStatusCode::ERROR_NOT_SUPPORTED) {
+        ASSERT_EQ(WifiStatusCode::SUCCESS, halStatus.code);
+
+        // wait for a callback
+        ASSERT_EQ(std::cv_status::no_timeout, wait(NOTIFY_ENABLE_RESPONSE));
+        ASSERT_EQ(NOTIFY_ENABLE_RESPONSE, callbackType);
+        ASSERT_EQ(id, inputCmdId);
+        ASSERT_EQ(status.status, NanStatusType::INVALID_ARGS);
+    }
 }
 
 /*
@@ -502,10 +505,12 @@
     nanEnableRequest.configParams.numberOfPublishServiceIdsInBeacon =
         128;  // must be <= 127
     NanConfigRequestSupplemental nanConfigRequestSupp = {};
-    ASSERT_EQ(WifiStatusCode::ERROR_INVALID_ARGS,
-              HIDL_INVOKE(iwifiNanIface, enableRequest_1_2, inputCmdId,
-                          nanEnableRequest, nanConfigRequestSupp)
-                  .code);
+    const auto& halStatus =
+        HIDL_INVOKE(iwifiNanIface, enableRequest_1_2, inputCmdId,
+                    nanEnableRequest, nanConfigRequestSupp);
+    if (halStatus.code != WifiStatusCode::ERROR_NOT_SUPPORTED) {
+        ASSERT_EQ(WifiStatusCode::ERROR_INVALID_ARGS, halStatus.code);
+    }
 }
 
 /*
@@ -516,15 +521,19 @@
     callbackType = INVALID;
     NanConfigRequest nanConfigRequest = {};
     NanConfigRequestSupplemental nanConfigRequestSupp = {};
-    ASSERT_EQ(WifiStatusCode::SUCCESS,
-              HIDL_INVOKE(iwifiNanIface, configRequest_1_2, inputCmdId,
-                          nanConfigRequest, nanConfigRequestSupp)
-                  .code);
-    // wait for a callback
-    ASSERT_EQ(std::cv_status::no_timeout, wait(NOTIFY_CONFIG_RESPONSE));
-    ASSERT_EQ(NOTIFY_CONFIG_RESPONSE, callbackType);
-    ASSERT_EQ(id, inputCmdId);
-    ASSERT_EQ(status.status, NanStatusType::INVALID_ARGS);
+    const auto& halStatus =
+        HIDL_INVOKE(iwifiNanIface, configRequest_1_2, inputCmdId,
+                    nanConfigRequest, nanConfigRequestSupp);
+
+    if (halStatus.code != WifiStatusCode::ERROR_NOT_SUPPORTED) {
+        ASSERT_EQ(WifiStatusCode::SUCCESS, halStatus.code);
+
+        // wait for a callback
+        ASSERT_EQ(std::cv_status::no_timeout, wait(NOTIFY_CONFIG_RESPONSE));
+        ASSERT_EQ(NOTIFY_CONFIG_RESPONSE, callbackType);
+        ASSERT_EQ(id, inputCmdId);
+        ASSERT_EQ(status.status, NanStatusType::INVALID_ARGS);
+    }
 }
 
 /*
@@ -536,14 +545,16 @@
     NanConfigRequest nanConfigRequest = {};
     nanConfigRequest.numberOfPublishServiceIdsInBeacon = 128;  // must be <= 127
     NanConfigRequestSupplemental nanConfigRequestSupp = {};
-    ASSERT_EQ(WifiStatusCode::ERROR_INVALID_ARGS,
-              HIDL_INVOKE(iwifiNanIface, configRequest_1_2, inputCmdId,
-                          nanConfigRequest, nanConfigRequestSupp)
-                  .code);
+    const auto& halStatus =
+        HIDL_INVOKE(iwifiNanIface, configRequest_1_2, inputCmdId,
+                    nanConfigRequest, nanConfigRequestSupp);
+    if (halStatus.code != WifiStatusCode::ERROR_NOT_SUPPORTED) {
+        ASSERT_EQ(WifiStatusCode::ERROR_INVALID_ARGS, halStatus.code);
+    }
 }
 
 INSTANTIATE_TEST_SUITE_P(
     PerInstance, WifiNanIfaceHidlTest,
     testing::ValuesIn(android::hardware::getAllHalInstanceNames(
         ::android::hardware::wifi::V1_2::IWifi::descriptor)),
-    android::hardware::PrintInstanceNameToString);
\ No newline at end of file
+    android::hardware::PrintInstanceNameToString);
diff --git a/wifi/1.4/default/wifi_chip.cpp b/wifi/1.4/default/wifi_chip.cpp
index a70457b..3498510 100644
--- a/wifi/1.4/default/wifi_chip.cpp
+++ b/wifi/1.4/default/wifi_chip.cpp
@@ -992,7 +992,7 @@
 std::pair<WifiStatus, sp<V1_0::IWifiRttController>>
 WifiChip::createRttControllerInternal(const sp<IWifiIface>& /*bound_iface*/) {
     LOG(ERROR) << "createRttController is not supported on this HAL";
-    return {createWifiStatus(WifiStatusCode::ERROR_NOT_AVAILABLE), {}};
+    return {createWifiStatus(WifiStatusCode::ERROR_NOT_SUPPORTED), {}};
 }
 
 std::pair<WifiStatus, std::vector<WifiDebugRingBufferStatus>>
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 1804d8c..345cf31 100644
--- a/wifi/hostapd/1.1/vts/functional/hostapd_hidl_test.cpp
+++ b/wifi/hostapd/1.1/vts/functional/hostapd_hidl_test.cpp
@@ -233,7 +233,11 @@
 TEST_P(HostapdHidlTest, AddPskAccessPointWithoutAcs) {
     auto status = HIDL_INVOKE(hostapd_, addAccessPoint_1_1,
                               getIfaceParamsWithoutAcs(), getPskNwParams());
-    EXPECT_EQ(HostapdStatusCode::SUCCESS, status.code);
+    // FAILURE_UNKNOWN is used by higher versions to indicate this API is no
+    // longer supported (replaced by an upgraded API)
+    if (status.code != HostapdStatusCode::FAILURE_UNKNOWN) {
+        EXPECT_EQ(HostapdStatusCode::SUCCESS, status.code);
+    }
 }
 
 /**
@@ -243,7 +247,11 @@
 TEST_P(HostapdHidlTest, AddOpenAccessPointWithoutAcs) {
     auto status = HIDL_INVOKE(hostapd_, addAccessPoint_1_1,
                               getIfaceParamsWithoutAcs(), getOpenNwParams());
-    EXPECT_EQ(HostapdStatusCode::SUCCESS, status.code);
+    // FAILURE_UNKNOWN is used by higher versions to indicate this API is no
+    // longer supported (replaced by an upgraded API)
+    if (status.code != HostapdStatusCode::FAILURE_UNKNOWN) {
+        EXPECT_EQ(HostapdStatusCode::SUCCESS, status.code);
+    }
 }
 
 /**
@@ -269,10 +277,14 @@
 TEST_P(HostapdHidlTest, RemoveAccessPointWithoutAcs) {
     auto status = HIDL_INVOKE(hostapd_, addAccessPoint_1_1,
                               getIfaceParamsWithoutAcs(), getPskNwParams());
-    EXPECT_EQ(HostapdStatusCode::SUCCESS, status.code);
-    status =
-        HIDL_INVOKE(hostapd_, removeAccessPoint, getPrimaryWlanIfaceName());
-    EXPECT_EQ(HostapdStatusCode::SUCCESS, status.code);
+    // FAILURE_UNKNOWN is used by higher versions to indicate this API is no
+    // longer supported (replaced by an upgraded API)
+    if (status.code != HostapdStatusCode::FAILURE_UNKNOWN) {
+        EXPECT_EQ(HostapdStatusCode::SUCCESS, status.code);
+        status =
+            HIDL_INVOKE(hostapd_, removeAccessPoint, getPrimaryWlanIfaceName());
+        EXPECT_EQ(HostapdStatusCode::SUCCESS, status.code);
+    }
 }
 
 /**