diff --git a/contexthub/1.2/vts/functional/VtsHalContexthubV1_2TargetTest.cpp b/contexthub/1.2/vts/functional/VtsHalContexthubV1_2TargetTest.cpp
index 782edae..c50d43c 100644
--- a/contexthub/1.2/vts/functional/VtsHalContexthubV1_2TargetTest.cpp
+++ b/contexthub/1.2/vts/functional/VtsHalContexthubV1_2TargetTest.cpp
@@ -32,45 +32,202 @@
 
 #include <cinttypes>
 
+using ::android::sp;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+using ::android::hardware::contexthub::V1_0::ContextHub;
+using ::android::hardware::contexthub::V1_0::Result;
+using ::android::hardware::contexthub::V1_0::TransactionResult;
 using ::android::hardware::contexthub::V1_1::SettingValue;
+using ::android::hardware::contexthub::V1_2::ContextHubMsg;
+using ::android::hardware::contexthub::V1_2::HubAppInfo;
 using ::android::hardware::contexthub::V1_2::IContexthub;
+using ::android::hardware::contexthub::V1_2::IContexthubCallback;
 using ::android::hardware::contexthub::V1_2::Setting;
+using ::android::hardware::contexthub::vts_utils::asBaseType;
 using ::android::hardware::contexthub::vts_utils::ContexthubCallbackBase;
 using ::android::hardware::contexthub::vts_utils::ContexthubHidlTestBase;
 using ::android::hardware::contexthub::vts_utils::getHalAndHubIdList;
+using ::android::hardware::contexthub::vts_utils::kNonExistentAppId;
+using ::android::hardware::contexthub::vts_utils::waitForCallback;
 
 namespace {
 
 const std::vector<std::tuple<std::string, std::string>> kTestParameters =
         getHalAndHubIdList<IContexthub>();
 
-class ContexthubHidlTest : public ContexthubHidlTestBase<IContexthub> {};
+class ContexthubCallbackV1_2 : public ContexthubCallbackBase<IContexthubCallback> {
+  public:
+    virtual Return<void> handleClientMsg_1_2(
+            const ContextHubMsg& /*msg*/,
+            const hidl_vec<hidl_string>& /*msgContentPerms*/) override {
+        ALOGD("Got client message callback");
+        return Void();
+    }
+
+    virtual Return<void> handleAppsInfo_1_2(const hidl_vec<HubAppInfo>& /*appInfo*/) override {
+        ALOGD("Got app info callback");
+        return Void();
+    }
+};
+
+class ContexthubHidlTest : public ContexthubHidlTestBase<IContexthub> {
+  public:
+    Result registerCallback_1_2(sp<IContexthubCallback> cb) {
+        return hubApi->registerCallback_1_2(getHubId(), cb);
+    }
+};
+
+// Ensures that the metadata reported in getHubs_1_2() is valid
+TEST_P(ContexthubHidlTest, TestGetHubs_1_2) {
+    hidl_vec<ContextHub> hubList;
+    hubApi->getHubs_1_2(
+            [&hubList](const hidl_vec<ContextHub>& hubs,
+                       const hidl_vec<hidl_string>& /*hubPermissions*/) { hubList = hubs; });
+
+    ALOGD("System reports %zu hubs", hubList.size());
+
+    for (const ContextHub& hub : hubList) {
+        ALOGD("Checking hub ID %" PRIu32, hub.hubId);
+
+        EXPECT_FALSE(hub.name.empty());
+        EXPECT_FALSE(hub.vendor.empty());
+        EXPECT_FALSE(hub.toolchain.empty());
+        EXPECT_GT(hub.peakMips, 0);
+        EXPECT_GE(hub.stoppedPowerDrawMw, 0);
+        EXPECT_GE(hub.sleepPowerDrawMw, 0);
+        EXPECT_GT(hub.peakPowerDrawMw, 0);
+
+        // Minimum 128 byte MTU as required by CHRE API v1.0
+        EXPECT_GE(hub.maxSupportedMsgLen, UINT32_C(128));
+    }
+}
+
+TEST_P(ContexthubHidlTest, TestRegisterCallback) {
+    ALOGD("TestRegisterCallback called, hubId %" PRIu32, getHubId());
+    ASSERT_OK(registerCallback_1_2(new ContexthubCallbackV1_2()));
+}
+
+TEST_P(ContexthubHidlTest, TestRegisterNullCallback) {
+    ALOGD("TestRegisterNullCallback called, hubId %" PRIu32, getHubId());
+    ASSERT_OK(registerCallback_1_2(nullptr));
+}
 
 // In VTS, we only test that sending the values doesn't cause things to blow up - other test
 // suites verify the expected E2E behavior in CHRE
 TEST_P(ContexthubHidlTest, TestOnWifiSettingChanged) {
-    ASSERT_OK(registerCallback(new ContexthubCallbackBase()));
+    ASSERT_OK(registerCallback_1_2(new ContexthubCallbackV1_2()));
     hubApi->onSettingChanged_1_2(Setting::WIFI_AVAILABLE, SettingValue::DISABLED);
     hubApi->onSettingChanged_1_2(Setting::WIFI_AVAILABLE, SettingValue::ENABLED);
-    ASSERT_OK(registerCallback(nullptr));
+    ASSERT_OK(registerCallback_1_2(nullptr));
 }
 
 TEST_P(ContexthubHidlTest, TestOnAirplaneModeSettingChanged) {
-    ASSERT_OK(registerCallback(new ContexthubCallbackBase()));
+    ASSERT_OK(registerCallback_1_2(new ContexthubCallbackV1_2()));
     hubApi->onSettingChanged_1_2(Setting::AIRPLANE_MODE, SettingValue::DISABLED);
     hubApi->onSettingChanged_1_2(Setting::AIRPLANE_MODE, SettingValue::ENABLED);
-    ASSERT_OK(registerCallback(nullptr));
+    ASSERT_OK(registerCallback_1_2(nullptr));
 }
 
 TEST_P(ContexthubHidlTest, TestOnGlobalMicDisableSettingChanged) {
-    ASSERT_OK(registerCallback(new ContexthubCallbackBase()));
+    ASSERT_OK(registerCallback_1_2(new ContexthubCallbackV1_2()));
     hubApi->onSettingChanged_1_2(Setting::GLOBAL_MIC_DISABLE, SettingValue::DISABLED);
     hubApi->onSettingChanged_1_2(Setting::GLOBAL_MIC_DISABLE, SettingValue::ENABLED);
-    ASSERT_OK(registerCallback(nullptr));
+    ASSERT_OK(registerCallback_1_2(nullptr));
+}
+
+// Helper callback that puts the async appInfo callback data into a promise
+class QueryAppsCallback : public ContexthubCallbackV1_2 {
+  public:
+    virtual Return<void> handleAppsInfo_1_2(const hidl_vec<HubAppInfo>& appInfo) override {
+        ALOGD("Got app info callback with %zu apps", appInfo.size());
+        promise.set_value(appInfo);
+        return Void();
+    }
+
+    std::promise<hidl_vec<HubAppInfo>> promise;
+};
+
+// Calls queryApps() and checks the returned metadata
+TEST_P(ContexthubHidlTest, TestQueryApps) {
+    hidl_vec<hidl_string> hubPerms;
+    hubApi->getHubs_1_2([&hubPerms](const hidl_vec<ContextHub>& /*hubs*/,
+                                    const hidl_vec<hidl_string>& hubPermissions) {
+        hubPerms = hubPermissions;
+    });
+
+    ALOGD("TestQueryApps called, hubId %u", getHubId());
+    sp<QueryAppsCallback> cb = new QueryAppsCallback();
+    ASSERT_OK(registerCallback_1_2(cb));
+
+    Result result = hubApi->queryApps(getHubId());
+    ASSERT_OK(result);
+
+    ALOGD("Waiting for app info callback");
+    hidl_vec<HubAppInfo> appList;
+    ASSERT_TRUE(waitForCallback(cb->promise.get_future(), &appList));
+    for (const HubAppInfo& appInfo : appList) {
+        EXPECT_NE(appInfo.info_1_0.appId, UINT64_C(0));
+        EXPECT_NE(appInfo.info_1_0.appId, kNonExistentAppId);
+        for (std::string permission : appInfo.permissions) {
+            ASSERT_TRUE(hubPerms.contains(permission));
+        }
+    }
+}
+
+// Helper callback that puts the TransactionResult for the expectedTxnId into a
+// promise
+class TxnResultCallback : public ContexthubCallbackV1_2 {
+  public:
+    virtual Return<void> handleTxnResult(uint32_t txnId, TransactionResult result) override {
+        ALOGD("Got transaction result callback for txnId %" PRIu32 " (expecting %" PRIu32
+              ") with result %" PRId32,
+              txnId, expectedTxnId, result);
+        if (txnId == expectedTxnId) {
+            promise.set_value(result);
+        }
+        return Void();
+    }
+
+    uint32_t expectedTxnId = 0;
+    std::promise<TransactionResult> promise;
+};
+
+// Parameterized fixture that sets the callback to TxnResultCallback
+class ContexthubTxnTest : public ContexthubHidlTest {
+  public:
+    virtual void SetUp() override {
+        ContexthubHidlTest::SetUp();
+        ASSERT_OK(registerCallback_1_2(cb));
+    }
+
+    sp<TxnResultCallback> cb = new TxnResultCallback();
+};
+
+TEST_P(ContexthubTxnTest, TestSendMessageToNonExistentNanoApp) {
+    ContextHubMsg msg;
+    msg.msg_1_0.appName = kNonExistentAppId;
+    msg.msg_1_0.msgType = 1;
+    msg.msg_1_0.msg.resize(4);
+    std::fill(msg.msg_1_0.msg.begin(), msg.msg_1_0.msg.end(), 0);
+
+    ALOGD("Sending message to non-existent nanoapp");
+    Result result = hubApi->sendMessageToHub_1_2(getHubId(), msg);
+    if (result != Result::OK && result != Result::BAD_PARAMS &&
+        result != Result::TRANSACTION_FAILED) {
+        FAIL() << "Got result " << asBaseType(result) << ", expected OK, BAD_PARAMS"
+               << ", or TRANSACTION_FAILED";
+    }
 }
 
 GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(ContexthubHidlTest);
 INSTANTIATE_TEST_SUITE_P(HubIdSpecificTests, ContexthubHidlTest, testing::ValuesIn(kTestParameters),
                          android::hardware::PrintInstanceTupleNameToString<>);
 
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(ContexthubTxnTest);
+INSTANTIATE_TEST_SUITE_P(HubIdSpecificTests, ContexthubTxnTest, testing::ValuesIn(kTestParameters),
+                         android::hardware::PrintInstanceTupleNameToString<>);
+
 }  // anonymous namespace