diff --git a/wifi/supplicant/1.3/vts/functional/supplicant_sta_iface_hidl_test.cpp b/wifi/supplicant/1.3/vts/functional/supplicant_sta_iface_hidl_test.cpp
index 12bd122..fba986e 100644
--- a/wifi/supplicant/1.3/vts/functional/supplicant_sta_iface_hidl_test.cpp
+++ b/wifi/supplicant/1.3/vts/functional/supplicant_sta_iface_hidl_test.cpp
@@ -349,7 +349,11 @@
     sta_iface_->getConnectionCapabilities(
         [&](const SupplicantStatus& status,
             ConnectionCapabilities /* capabilities */) {
-            EXPECT_EQ(SupplicantStatusCode::SUCCESS, status.code);
+            // Since getConnectionCapabilities() is overridden by an
+            // upgraded API in newer HAL versions, allow for FAILURE_UNKNOWN
+            if (status.code != SupplicantStatusCode::FAILURE_UNKNOWN) {
+                EXPECT_EQ(SupplicantStatusCode::SUCCESS, status.code);
+            }
         });
 }
 
diff --git a/wifi/supplicant/1.4/Android.bp b/wifi/supplicant/1.4/Android.bp
index ff2a8bc..81e1738 100644
--- a/wifi/supplicant/1.4/Android.bp
+++ b/wifi/supplicant/1.4/Android.bp
@@ -4,7 +4,9 @@
     name: "android.hardware.wifi.supplicant@1.4",
     root: "android.hardware",
     srcs: [
+        "types.hal",
         "ISupplicant.hal",
+        "ISupplicantStaIface.hal",
     ],
     interfaces: [
         "android.hardware.wifi.supplicant@1.0",
diff --git a/wifi/supplicant/1.4/ISupplicantStaIface.hal b/wifi/supplicant/1.4/ISupplicantStaIface.hal
new file mode 100644
index 0000000..28ef912
--- /dev/null
+++ b/wifi/supplicant/1.4/ISupplicantStaIface.hal
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.wifi.supplicant@1.4;
+
+import @1.0::SupplicantStatus;
+import @1.3::ISupplicantStaIface;
+
+/**
+ * Interface exposed by the supplicant for each station mode network
+ * interface (e.g wlan0) it controls.
+ */
+interface ISupplicantStaIface extends @1.3::ISupplicantStaIface {
+
+    /**
+     * Get Connection capabilities
+     *
+     * @return status Status of the operation, and connection capabilities.
+     *         Possible status codes:
+     *         |SupplicantStatusCode.SUCCESS|,
+     *         |SupplicantStatusCode.FAILURE_UNKNOWN|,
+     */
+    getConnectionCapabilities_1_4()
+        generates (SupplicantStatus status, ConnectionCapabilities capabilities);
+
+};
diff --git a/wifi/supplicant/1.4/types.hal b/wifi/supplicant/1.4/types.hal
new file mode 100644
index 0000000..79e367a
--- /dev/null
+++ b/wifi/supplicant/1.4/types.hal
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.wifi.supplicant@1.4;
+
+import @1.3::ConnectionCapabilities;
+
+/**
+ * Detailed network mode for legacy network
+ */
+enum LegacyMode : uint32_t {
+    UNKNOWN = 0,
+    /**
+     * For 802.11a
+     */
+    A_MODE = 1,
+    /**
+     * For 802.11b
+     */
+    B_MODE = 2,
+    /**
+     * For 802.11g
+     */
+    G_MODE = 3,
+};
+
+/**
+ * Connection Capabilities supported by current network and device
+ */
+struct ConnectionCapabilities {
+    /**
+     * Baseline information as defined in HAL 1.3.
+     */
+    @1.3::ConnectionCapabilities V1_3;
+    /**
+     * detailed network mode for legacy network
+     */
+    LegacyMode legacyMode;
+};
diff --git a/wifi/supplicant/1.4/vts/OWNERS b/wifi/supplicant/1.4/vts/OWNERS
new file mode 100644
index 0000000..8bfb148
--- /dev/null
+++ b/wifi/supplicant/1.4/vts/OWNERS
@@ -0,0 +1,2 @@
+rpius@google.com
+etancohen@google.com
diff --git a/wifi/supplicant/1.4/vts/functional/Android.bp b/wifi/supplicant/1.4/vts/functional/Android.bp
new file mode 100644
index 0000000..7f2ba70
--- /dev/null
+++ b/wifi/supplicant/1.4/vts/functional/Android.bp
@@ -0,0 +1,71 @@
+//
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+cc_library_static {
+    name: "VtsHalWifiSupplicantV1_4TargetTestUtil",
+    defaults: ["VtsHalTargetTestDefaults"],
+    srcs: ["supplicant_hidl_test_utils_1_4.cpp"],
+    export_include_dirs: [
+        ".",
+    ],
+    static_libs: [
+        "VtsHalWifiV1_0TargetTestUtil",
+        "VtsHalWifiSupplicantV1_0TargetTestUtil",
+        "VtsHalWifiSupplicantV1_1TargetTestUtil",
+        "VtsHalWifiSupplicantV1_2TargetTestUtil",
+        "VtsHalWifiSupplicantV1_3TargetTestUtil",
+        "android.hardware.wifi.supplicant@1.0",
+        "android.hardware.wifi.supplicant@1.1",
+        "android.hardware.wifi.supplicant@1.2",
+        "android.hardware.wifi.supplicant@1.3",
+        "android.hardware.wifi.supplicant@1.4",
+        "android.hardware.wifi@1.0",
+        "libgmock",
+        "libwifi-system",
+        "libwifi-system-iface",
+    ],
+}
+
+cc_test {
+    name: "VtsHalWifiSupplicantV1_4TargetTest",
+    defaults: ["VtsHalTargetTestDefaults"],
+    srcs: [
+        "supplicant_sta_iface_hidl_test.cpp",
+    ],
+    static_libs: [
+        "VtsHalWifiV1_0TargetTestUtil",
+        "VtsHalWifiSupplicantV1_0TargetTestUtil",
+        "VtsHalWifiSupplicantV1_1TargetTestUtil",
+        "VtsHalWifiSupplicantV1_2TargetTestUtil",
+        "VtsHalWifiSupplicantV1_3TargetTestUtil",
+        "VtsHalWifiSupplicantV1_4TargetTestUtil",
+        "android.hardware.wifi.supplicant@1.0",
+        "android.hardware.wifi.supplicant@1.1",
+        "android.hardware.wifi.supplicant@1.2",
+        "android.hardware.wifi.supplicant@1.3",
+        "android.hardware.wifi.supplicant@1.4",
+        "android.hardware.wifi@1.0",
+        "android.hardware.wifi@1.1",
+        "libgmock",
+        "libwifi-system",
+        "libwifi-system-iface",
+    ],
+    test_suites: [
+        "general-tests",
+        "vts",
+    ],
+    disable_framework: true,
+}
diff --git a/wifi/supplicant/1.4/vts/functional/supplicant_hidl_test_utils_1_4.cpp b/wifi/supplicant/1.4/vts/functional/supplicant_hidl_test_utils_1_4.cpp
new file mode 100644
index 0000000..3a59bd6
--- /dev/null
+++ b/wifi/supplicant/1.4/vts/functional/supplicant_hidl_test_utils_1_4.cpp
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <android-base/logging.h>
+
+#include "supplicant_hidl_test_utils.h"
+#include "supplicant_hidl_test_utils_1_4.h"
+
+using ::android::sp;
+using ::android::hardware::wifi::supplicant::V1_4::ISupplicant;
+using ::android::hardware::wifi::supplicant::V1_4::ISupplicantStaIface;
+
+sp<ISupplicantStaIface> getSupplicantStaIface_1_4(
+    const android::sp<android::hardware::wifi::supplicant::V1_4::ISupplicant>&
+        supplicant) {
+    return ISupplicantStaIface::castFrom(getSupplicantStaIface(supplicant));
+}
+
+sp<ISupplicant> getSupplicant_1_4(const std::string& supplicant_instance_name,
+                                  bool isP2pOn) {
+    return ISupplicant::castFrom(
+        getSupplicant(supplicant_instance_name, isP2pOn));
+}
diff --git a/wifi/supplicant/1.4/vts/functional/supplicant_hidl_test_utils_1_4.h b/wifi/supplicant/1.4/vts/functional/supplicant_hidl_test_utils_1_4.h
new file mode 100644
index 0000000..bea4dc1
--- /dev/null
+++ b/wifi/supplicant/1.4/vts/functional/supplicant_hidl_test_utils_1_4.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SUPPLICANT_HIDL_TEST_UTILS_1_4_H
+#define SUPPLICANT_HIDL_TEST_UTILS_1_4_H
+
+#include <android/hardware/wifi/supplicant/1.4/ISupplicant.h>
+#include <android/hardware/wifi/supplicant/1.4/ISupplicantStaIface.h>
+
+android::sp<android::hardware::wifi::supplicant::V1_4::ISupplicantStaIface>
+getSupplicantStaIface_1_4(
+    const android::sp<android::hardware::wifi::supplicant::V1_4::ISupplicant>&
+        supplicant);
+android::sp<android::hardware::wifi::supplicant::V1_4::ISupplicant>
+getSupplicant_1_4(const std::string& supplicant_instance_name, bool isP2pOn);
+
+#endif /* SUPPLICANT_HIDL_TEST_UTILS_1_4_H */
diff --git a/wifi/supplicant/1.4/vts/functional/supplicant_sta_iface_hidl_test.cpp b/wifi/supplicant/1.4/vts/functional/supplicant_sta_iface_hidl_test.cpp
new file mode 100644
index 0000000..2a4f534
--- /dev/null
+++ b/wifi/supplicant/1.4/vts/functional/supplicant_sta_iface_hidl_test.cpp
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <VtsCoreUtil.h>
+#include <android/hardware/wifi/1.1/IWifi.h>
+#include <android/hardware/wifi/supplicant/1.1/ISupplicant.h>
+#include <android/hardware/wifi/supplicant/1.2/types.h>
+#include <android/hardware/wifi/supplicant/1.3/ISupplicant.h>
+#include <android/hardware/wifi/supplicant/1.3/types.h>
+#include <android/hardware/wifi/supplicant/1.4/ISupplicant.h>
+#include <android/hardware/wifi/supplicant/1.4/ISupplicantStaIface.h>
+#include <android/hardware/wifi/supplicant/1.4/types.h>
+#include <gtest/gtest.h>
+#include <hidl/GtestPrinter.h>
+#include <hidl/HidlSupport.h>
+#include <hidl/ServiceManagement.h>
+
+#include "supplicant_hidl_test_utils.h"
+#include "supplicant_hidl_test_utils_1_4.h"
+
+using ::android::sp;
+using ::android::hardware::Void;
+using ::android::hardware::wifi::supplicant::V1_0::SupplicantStatus;
+using ::android::hardware::wifi::supplicant::V1_0::SupplicantStatusCode;
+
+using ::android::hardware::wifi::supplicant::V1_4::ConnectionCapabilities;
+using ::android::hardware::wifi::supplicant::V1_4::ISupplicant;
+using ::android::hardware::wifi::supplicant::V1_4::ISupplicantStaIface;
+
+class SupplicantStaIfaceHidlTest
+    : public ::testing::TestWithParam<std::tuple<std::string, std::string>> {
+   public:
+    virtual void SetUp() override {
+        wifi_v1_0_instance_name_ = std::get<0>(GetParam());
+        supplicant_v1_4_instance_name_ = std::get<1>(GetParam());
+        isP2pOn_ =
+            testing::deviceSupportsFeature("android.hardware.wifi.direct");
+
+        stopSupplicant(wifi_v1_0_instance_name_);
+        startSupplicantAndWaitForHidlService(wifi_v1_0_instance_name_,
+                                             supplicant_v1_4_instance_name_);
+        supplicant_ =
+            getSupplicant_1_4(supplicant_v1_4_instance_name_, isP2pOn_);
+        EXPECT_TRUE(turnOnExcessiveLogging(supplicant_));
+        sta_iface_ = getSupplicantStaIface_1_4(supplicant_);
+        ASSERT_NE(sta_iface_.get(), nullptr);
+    }
+
+    virtual void TearDown() override {
+        stopSupplicant(wifi_v1_0_instance_name_);
+    }
+
+   protected:
+    // ISupplicantStaIface object used for all tests in this fixture.
+    sp<ISupplicantStaIface> sta_iface_;
+    sp<ISupplicant> supplicant_;
+    bool isP2pOn_ = false;
+    std::string wifi_v1_0_instance_name_;
+    std::string supplicant_v1_4_instance_name_;
+};
+
+/*
+ * getConnectionCapabilities_1_4
+ */
+TEST_P(SupplicantStaIfaceHidlTest, GetConnectionCapabilities) {
+    sta_iface_->getConnectionCapabilities_1_4(
+        [&](const SupplicantStatus& status,
+            ConnectionCapabilities /* capabilities */) {
+            EXPECT_EQ(SupplicantStatusCode::SUCCESS, status.code);
+        });
+}
+
+INSTANTIATE_TEST_CASE_P(
+    PerInstance, SupplicantStaIfaceHidlTest,
+    testing::Combine(
+        testing::ValuesIn(android::hardware::getAllHalInstanceNames(
+            android::hardware::wifi::V1_0::IWifi::descriptor)),
+        testing::ValuesIn(android::hardware::getAllHalInstanceNames(
+            android::hardware::wifi::supplicant::V1_4::ISupplicant::
+                descriptor))),
+    android::hardware::PrintInstanceTupleNameToString<>);