diff --git a/Tethering/Android.bp b/Tethering/Android.bp
index 5a08b23..d3b9393 100644
--- a/Tethering/Android.bp
+++ b/Tethering/Android.bp
@@ -156,7 +156,5 @@
 
 sdk {
     name: "tethering-module-sdk",
-    java_sdk_libs: [
-        "framework-tethering",
-    ],
+    bootclasspath_fragments: ["com.android.tethering-bootclasspath-fragment"],
 }
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 8b91a45..fd8397f 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -79,6 +79,8 @@
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
 import static android.net.NetworkRequest.Type.LISTEN_FOR_BEST;
+import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST;
+import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST_ONLY;
 import static android.net.shared.NetworkMonitorUtils.isPrivateDnsValidationRequired;
 import static android.os.Process.INVALID_UID;
 import static android.os.Process.VPN_UID;
@@ -2636,6 +2638,12 @@
                 "ConnectivityService");
     }
 
+    private void enforceManageTestNetworksPermission() {
+        mContext.enforceCallingOrSelfPermission(
+                android.Manifest.permission.MANAGE_TEST_NETWORKS,
+                "ConnectivityService");
+    }
+
     private boolean checkNetworkStackPermission() {
         return checkAnyPermissionOf(
                 android.Manifest.permission.NETWORK_STACK,
@@ -9967,8 +9975,15 @@
             @NonNull final OemNetworkPreferences preference,
             @Nullable final IOnCompleteListener listener) {
 
-        enforceAutomotiveDevice();
-        enforceOemNetworkPreferencesPermission();
+        Objects.requireNonNull(preference, "OemNetworkPreferences must be non-null");
+        // Only bypass the permission/device checks if this is a valid test request.
+        if (isValidTestOemNetworkPreference(preference)) {
+            enforceManageTestNetworksPermission();
+        } else {
+            enforceAutomotiveDevice();
+            enforceOemNetworkPreferencesPermission();
+            validateOemNetworkPreferences(preference);
+        }
 
         // TODO: Have a priority for each preference.
         if (!mProfileNetworkPreferences.isEmpty() || !mMobileDataPreferredUids.isEmpty()) {
@@ -9980,18 +9995,41 @@
             throwConcurrentPreferenceException();
         }
 
-        Objects.requireNonNull(preference, "OemNetworkPreferences must be non-null");
-        validateOemNetworkPreferences(preference);
         mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_OEM_NETWORK_PREFERENCE,
                 new Pair<>(preference, listener)));
     }
 
+    /**
+     * Check the validity of an OEM network preference to be used for testing purposes.
+     * @param preference the preference to validate
+     * @return true if this is a valid OEM network preference test request.
+     */
+    private boolean isValidTestOemNetworkPreference(
+            @NonNull final OemNetworkPreferences preference) {
+        // Allow for clearing of an existing OemNetworkPreference used for testing.
+        // This isn't called on the handler thread so it is possible that mOemNetworkPreferences
+        // changes after this check is complete. This is an unlikely scenario as calling of this API
+        // is controlled by the OEM therefore the added complexity is not worth adding given those
+        // circumstances. That said, it is an edge case to be aware of hence this comment.
+        final boolean isValidTestClearPref = preference.getNetworkPreferences().size() == 0
+                && isTestOemNetworkPreference(mOemNetworkPreferences);
+        return isTestOemNetworkPreference(preference) || isValidTestClearPref;
+    }
+
+    private boolean isTestOemNetworkPreference(@NonNull final OemNetworkPreferences preference) {
+        final Map<String, Integer> prefMap = preference.getNetworkPreferences();
+        return prefMap.size() == 1
+                && (prefMap.containsValue(OEM_NETWORK_PREFERENCE_TEST)
+                || prefMap.containsValue(OEM_NETWORK_PREFERENCE_TEST_ONLY));
+    }
+
     private void validateOemNetworkPreferences(@NonNull OemNetworkPreferences preference) {
         for (@OemNetworkPreferences.OemNetworkPreference final int pref
                 : preference.getNetworkPreferences().values()) {
-            if (OemNetworkPreferences.OEM_NETWORK_PREFERENCE_UNINITIALIZED == pref) {
-                final String msg = "OEM_NETWORK_PREFERENCE_UNINITIALIZED is an invalid value.";
-                throw new IllegalArgumentException(msg);
+            if (pref <= 0 || OemNetworkPreferences.OEM_NETWORK_PREFERENCE_MAX < pref) {
+                throw new IllegalArgumentException(
+                        OemNetworkPreferences.oemNetworkPreferenceToString(pref)
+                                + " is an invalid value.");
             }
         }
     }
@@ -10215,13 +10253,21 @@
                 case OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PRIVATE_ONLY:
                     requests.add(createOemPrivateNetworkRequest());
                     break;
+                case OEM_NETWORK_PREFERENCE_TEST:
+                    requests.add(createUnmeteredNetworkRequest());
+                    requests.add(createTestNetworkRequest());
+                    requests.add(createDefaultRequest());
+                    break;
+                case OEM_NETWORK_PREFERENCE_TEST_ONLY:
+                    requests.add(createTestNetworkRequest());
+                    break;
                 default:
                     // This should never happen.
                     throw new IllegalArgumentException("createNriFromOemNetworkPreferences()"
                             + " called with invalid preference of " + preference);
             }
 
-            final ArraySet ranges = new ArraySet<Integer>();
+            final ArraySet<UidRange> ranges = new ArraySet<>();
             for (final int uid : uids) {
                 ranges.add(new UidRange(uid, uid));
             }
@@ -10254,10 +10300,17 @@
         }
 
         private NetworkCapabilities createDefaultPerAppNetCap() {
-            final NetworkCapabilities netCap = new NetworkCapabilities();
-            netCap.addCapability(NET_CAPABILITY_INTERNET);
-            netCap.setRequestorUidAndPackageName(Process.myUid(), mContext.getPackageName());
-            return netCap;
+            final NetworkCapabilities netcap = new NetworkCapabilities();
+            netcap.addCapability(NET_CAPABILITY_INTERNET);
+            netcap.setRequestorUidAndPackageName(Process.myUid(), mContext.getPackageName());
+            return netcap;
+        }
+
+        private NetworkRequest createTestNetworkRequest() {
+            final NetworkCapabilities netcap = new NetworkCapabilities();
+            netcap.clearAll();
+            netcap.addTransportType(TRANSPORT_TEST);
+            return createNetworkRequest(NetworkRequest.Type.REQUEST, netcap);
         }
     }
 }
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
index 532fd86..8485263 100755
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
@@ -17,6 +17,7 @@
 package com.android.cts.net.hostside;
 
 import static android.Manifest.permission.NETWORK_SETTINGS;
+import static android.net.ConnectivityManager.TYPE_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.os.Process.INVALID_UID;
 import static android.system.OsConstants.AF_INET;
@@ -759,6 +760,7 @@
         assertEquals(vpnNetwork, mCM.getActiveNetwork());
         assertNotEqual(defaultNetwork, vpnNetwork);
         maybeExpectVpnTransportInfo(vpnNetwork);
+        assertTrue(mCM.getNetworkInfo(vpnNetwork).getType() == TYPE_VPN);
 
         if (SdkLevel.isAtLeastS()) {
             // Check that system default network callback has not seen any network changes, even
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index 1d84a1b..8b8a8fb 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -65,11 +65,13 @@
 import static android.system.OsConstants.AF_INET6;
 import static android.system.OsConstants.AF_UNSPEC;
 
+import static com.android.compatibility.common.util.SystemUtil.callWithShellPermissionIdentity;
 import static com.android.compatibility.common.util.SystemUtil.runShellCommand;
 import static com.android.compatibility.common.util.SystemUtil.runWithShellPermissionIdentity;
 import static com.android.networkstack.apishim.ConstantsShim.BLOCKED_REASON_LOCKDOWN_VPN;
 import static com.android.networkstack.apishim.ConstantsShim.BLOCKED_REASON_NONE;
 import static com.android.testutils.MiscAsserts.assertThrows;
+import static com.android.testutils.TestNetworkTrackerKt.initTestNetwork;
 import static com.android.testutils.TestPermissionUtil.runAsShell;
 
 import static org.junit.Assert.assertEquals;
@@ -112,6 +114,7 @@
 import android.net.NetworkSpecifier;
 import android.net.NetworkStateSnapshot;
 import android.net.NetworkUtils;
+import android.net.OemNetworkPreferences;
 import android.net.ProxyInfo;
 import android.net.SocketKeepalive;
 import android.net.TelephonyNetworkSpecifier;
@@ -155,6 +158,7 @@
 import com.android.testutils.DevSdkIgnoreRuleKt;
 import com.android.testutils.RecorderCallback.CallbackEntry;
 import com.android.testutils.SkipPresubmit;
+import com.android.testutils.TestNetworkTracker;
 import com.android.testutils.TestableNetworkCallback;
 
 import junit.framework.AssertionFailedError;
@@ -191,6 +195,7 @@
 import java.util.concurrent.Executor;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
 import java.util.function.Supplier;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -461,6 +466,7 @@
                 android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE);
     }
 
+    @AppModeFull(reason = "Cannot request network in instant app mode")
     @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
     @Test
     public void testGetAllNetworkStateSnapshots()
@@ -517,13 +523,8 @@
     @Test
     @SkipPresubmit(reason = "Virtual devices use a single internet connection for all networks")
     public void testOpenConnection() throws Exception {
-        boolean canRunTest = mPackageManager.hasSystemFeature(FEATURE_WIFI)
-                && mPackageManager.hasSystemFeature(FEATURE_TELEPHONY);
-        if (!canRunTest) {
-            Log.i(TAG,"testOpenConnection cannot execute unless device supports both WiFi "
-                    + "and a cellular connection");
-            return;
-        }
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_TELEPHONY));
 
         Network wifiNetwork = mCtsNetUtils.connectToWifi();
         Network cellNetwork = mCtsNetUtils.connectToCell();
@@ -698,10 +699,7 @@
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
     public void testRegisterNetworkCallback() {
-        if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
-            Log.i(TAG, "testRegisterNetworkCallback cannot execute unless device supports WiFi");
-            return;
-        }
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
         // We will register for a WIFI network being available or lost.
         final TestNetworkCallback callback = new TestNetworkCallback();
@@ -765,10 +763,7 @@
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
     public void testRegisterNetworkCallback_withPendingIntent() {
-        if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
-            Log.i(TAG, "testRegisterNetworkCallback cannot execute unless device supports WiFi");
-            return;
-        }
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
         // Create a ConnectivityActionReceiver that has an IntentFilter for our locally defined
         // action, NETWORK_CALLBACK_ACTION.
@@ -939,7 +934,8 @@
         }
     }
 
-    private void waitForActiveNetworkMetered(int targetTransportType, boolean requestedMeteredness)
+    private void waitForActiveNetworkMetered(final int targetTransportType,
+            final boolean requestedMeteredness, final boolean useSystemDefault)
             throws Exception {
         final CountDownLatch latch = new CountDownLatch(1);
         final NetworkCallback networkCallback = new NetworkCallback() {
@@ -953,17 +949,36 @@
                 }
             }
         };
-        // Registering a callback here guarantees onCapabilitiesChanged is called immediately
-        // with the current setting. Therefore, if the setting has already been changed,
-        // this method will return right away, and if not it will wait for the setting to change.
-        mCm.registerDefaultNetworkCallback(networkCallback);
-        // Changing meteredness on wifi involves reconnecting, which can take several seconds
-        // (involves re-associating, DHCP...).
-        if (!latch.await(NETWORK_CALLBACK_TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
-            fail("Timed out waiting for active network metered status to change to "
-                 + requestedMeteredness + " ; network = " + mCm.getActiveNetwork());
+
+        try {
+            // Registering a callback here guarantees onCapabilitiesChanged is called immediately
+            // with the current setting. Therefore, if the setting has already been changed,
+            // this method will return right away, and if not, it'll wait for the setting to change.
+            if (useSystemDefault) {
+                runWithShellPermissionIdentity(() ->
+                                mCmShim.registerSystemDefaultNetworkCallback(networkCallback,
+                                        new Handler(Looper.getMainLooper())),
+                        NETWORK_SETTINGS);
+            } else {
+                mCm.registerDefaultNetworkCallback(networkCallback);
+            }
+
+            // Changing meteredness on wifi involves reconnecting, which can take several seconds
+            // (involves re-associating, DHCP...).
+            if (!latch.await(NETWORK_CALLBACK_TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
+                fail("Timed out waiting for active network metered status to change to "
+                        + requestedMeteredness + " ; network = " + mCm.getActiveNetwork());
+            }
+        } finally {
+            mCm.unregisterNetworkCallback(networkCallback);
         }
-        mCm.unregisterNetworkCallback(networkCallback);
+    }
+
+    private void setWifiMeteredStatusAndWait(String ssid, boolean isMetered) throws Exception {
+        setWifiMeteredStatus(ssid, Boolean.toString(isMetered) /* metered */);
+        waitForActiveNetworkMetered(TRANSPORT_WIFI,
+                isMetered /* requestedMeteredness */,
+                true /* useSystemDefault */);
     }
 
     private void assertMultipathPreferenceIsEventually(Network network, int oldValue,
@@ -1025,10 +1040,9 @@
             int newMeteredPreference = findNextPrefValue(resolver);
             Settings.Global.putString(resolver, NETWORK_METERED_MULTIPATH_PREFERENCE,
                     Integer.toString(newMeteredPreference));
-            setWifiMeteredStatus(ssid, "true");
-            waitForActiveNetworkMetered(TRANSPORT_WIFI, true);
             // Wifi meterness changes from unmetered to metered will disconnect and reconnect since
             // R.
+            setWifiMeteredStatusAndWait(ssid, true);
             final Network network = mCtsNetUtils.ensureWifiConnected();
             assertEquals(ssid, unquoteSSID(mWifiManager.getConnectionInfo().getSSID()));
             assertEquals(mCm.getNetworkCapabilities(network).hasCapability(
@@ -1045,9 +1059,8 @@
             assertMultipathPreferenceIsEventually(network,
                     oldMeteredPreference, newMeteredPreference);
 
-            setWifiMeteredStatus(ssid, "false");
             // No disconnect from unmetered to metered.
-            waitForActiveNetworkMetered(TRANSPORT_WIFI, false);
+            setWifiMeteredStatusAndWait(ssid, false);
             assertEquals(mCm.getNetworkCapabilities(network).hasCapability(
                     NET_CAPABILITY_NOT_METERED), true);
             assertMultipathPreferenceIsEventually(network, newMeteredPreference,
@@ -1237,11 +1250,7 @@
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
     public void testKeepaliveWifiUnsupported() throws Exception {
-        if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
-            Log.i(TAG, "testKeepaliveUnsupported cannot execute unless device"
-                    + " supports WiFi");
-            return;
-        }
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
         final Network network = mCtsNetUtils.ensureWifiConnected();
         if (getSupportedKeepalivesForNet(network) != 0) return;
@@ -1258,10 +1267,7 @@
     @Test
     @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
     public void testCreateTcpKeepalive() throws Exception {
-        if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
-            Log.i(TAG, "testCreateTcpKeepalive cannot execute unless device supports WiFi");
-            return;
-        }
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
         final Network network = mCtsNetUtils.ensureWifiConnected();
         if (getSupportedKeepalivesForNet(network) == 0) return;
@@ -1468,11 +1474,7 @@
     @Test
     @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
     public void testSocketKeepaliveLimitWifi() throws Exception {
-        if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
-            Log.i(TAG, "testSocketKeepaliveLimitWifi cannot execute unless device"
-                    + " supports WiFi");
-            return;
-        }
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
         final Network network = mCtsNetUtils.ensureWifiConnected();
         final int supported = getSupportedKeepalivesForNet(network);
@@ -1565,11 +1567,7 @@
     @Test
     @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
     public void testSocketKeepaliveUnprivileged() throws Exception {
-        if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
-            Log.i(TAG, "testSocketKeepaliveUnprivileged cannot execute unless device"
-                    + " supports WiFi");
-            return;
-        }
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
         final Network network = mCtsNetUtils.ensureWifiConnected();
         final int supported = getSupportedKeepalivesForNet(network);
@@ -1716,6 +1714,24 @@
                 c -> c instanceof CallbackEntry.Available);
     }
 
+    private void waitForAvailable(
+            @NonNull final TestableNetworkCallback cb, final int expectedTransport) {
+        cb.eventuallyExpect(
+                CallbackEntry.AVAILABLE, NETWORK_CALLBACK_TIMEOUT_MS,
+                entry -> {
+                    final NetworkCapabilities nc = mCm.getNetworkCapabilities(entry.getNetwork());
+                    return nc.hasTransport(expectedTransport);
+                }
+        );
+    }
+
+    private void waitForAvailable(
+            @NonNull final TestableNetworkCallback cb, @NonNull final Network expectedNetwork) {
+        cb.expectAvailableCallbacks(expectedNetwork, false /* suspended */,
+                true /* validated */,
+                false /* blocked */, NETWORK_CALLBACK_TIMEOUT_MS);
+    }
+
     private void waitForLost(@NonNull final TestableNetworkCallback cb) {
         cb.eventuallyExpect(CallbackEntry.LOST, NETWORK_CALLBACK_TIMEOUT_MS,
                 c -> c instanceof CallbackEntry.Lost);
@@ -2036,6 +2052,7 @@
         assertThrows(SecurityException.class, () -> mCm.factoryReset());
     }
 
+    @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
     public void testFactoryReset() throws Exception {
         assumeTrue(TestUtils.shouldTestSApis());
@@ -2101,4 +2118,172 @@
         startTetheringCallback.verifyTetheringStarted();
         callback.expectTetheredInterfacesChanged(wifiRegexs, TETHERING_WIFI);
     }
+
+    /**
+     * Verify that per-app OEM network preference functions as expected for network preference TEST.
+     * For specified apps, validate networks are prioritized in order: unmetered, TEST transport,
+     * default network.
+     */
+    @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
+    @Test
+    public void testSetOemNetworkPreferenceForTestPref() throws Exception {
+        // Cannot use @IgnoreUpTo(Build.VERSION_CODES.R) because this test also requires API 31
+        // shims, and @IgnoreUpTo does not check that.
+        assumeTrue(TestUtils.shouldTestSApis());
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
+
+        final TestNetworkTracker tnt = callWithShellPermissionIdentity(
+                () -> initTestNetwork(mContext, TEST_LINKADDR, NETWORK_CALLBACK_TIMEOUT_MS));
+        final TestableNetworkCallback defaultCallback = new TestableNetworkCallback();
+        final TestableNetworkCallback systemDefaultCallback = new TestableNetworkCallback();
+
+        final Network wifiNetwork = mCtsNetUtils.ensureWifiConnected();
+        final NetworkCapabilities wifiNetworkCapabilities = callWithShellPermissionIdentity(
+                () -> mCm.getNetworkCapabilities(wifiNetwork));
+        final String ssid = unquoteSSID(wifiNetworkCapabilities.getSsid());
+        final boolean oldMeteredValue = wifiNetworkCapabilities.isMetered();
+
+        try {
+            // This network will be used for unmetered.
+            setWifiMeteredStatusAndWait(ssid, false /* isMetered */);
+
+            setOemNetworkPreferenceForMyPackage(OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST);
+            registerTestOemNetworkPreferenceCallbacks(defaultCallback, systemDefaultCallback);
+
+            // Validate that an unmetered network is used over other networks.
+            waitForAvailable(defaultCallback, wifiNetwork);
+            waitForAvailable(systemDefaultCallback, wifiNetwork);
+
+            // Validate when setting unmetered to metered, unmetered is lost and replaced by the
+            // network with the TEST transport.
+            setWifiMeteredStatusAndWait(ssid, true /* isMetered */);
+            defaultCallback.expectCallback(CallbackEntry.LOST, wifiNetwork);
+            waitForAvailable(defaultCallback, tnt.getNetwork());
+            // Depending on if this device has cellular connectivity or not, multiple available
+            // callbacks may be received. Eventually, metered Wi-Fi should be the final available
+            // callback in any case therefore confirm its receipt before continuing to assure the
+            // system is in the expected state.
+            waitForAvailable(systemDefaultCallback, TRANSPORT_WIFI);
+        } finally {
+            // Validate that removing the test network will fallback to the default network.
+            runWithShellPermissionIdentity(tnt::teardown);
+            defaultCallback.expectCallback(CallbackEntry.LOST, tnt.getNetwork());
+            waitForAvailable(defaultCallback);
+
+            setWifiMeteredStatusAndWait(ssid, oldMeteredValue);
+
+            // Cleanup any prior test state from setOemNetworkPreference
+            clearOemNetworkPreference();
+            unregisterTestOemNetworkPreferenceCallbacks(defaultCallback, systemDefaultCallback);
+        }
+    }
+
+    /**
+     * Verify that per-app OEM network preference functions as expected for network pref TEST_ONLY.
+     * For specified apps, validate that only TEST transport type networks are used.
+     */
+    @Test
+    public void testSetOemNetworkPreferenceForTestOnlyPref() throws Exception {
+        // Cannot use @IgnoreUpTo(Build.VERSION_CODES.R) because this test also requires API 31
+        // shims, and @IgnoreUpTo does not check that.
+        assumeTrue(TestUtils.shouldTestSApis());
+
+        final TestNetworkTracker tnt = callWithShellPermissionIdentity(
+                () -> initTestNetwork(mContext, TEST_LINKADDR, NETWORK_CALLBACK_TIMEOUT_MS));
+        final TestableNetworkCallback defaultCallback = new TestableNetworkCallback();
+        final TestableNetworkCallback systemDefaultCallback = new TestableNetworkCallback();
+
+        final Network wifiNetwork = mCtsNetUtils.ensureWifiConnected();
+
+        try {
+            setOemNetworkPreferenceForMyPackage(
+                    OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST_ONLY);
+            registerTestOemNetworkPreferenceCallbacks(defaultCallback, systemDefaultCallback);
+            waitForAvailable(defaultCallback, tnt.getNetwork());
+            waitForAvailable(systemDefaultCallback, wifiNetwork);
+        } finally {
+            runWithShellPermissionIdentity(tnt::teardown);
+            defaultCallback.expectCallback(CallbackEntry.LOST, tnt.getNetwork());
+
+            // This network preference should only ever use the test network therefore available
+            // should not trigger when the test network goes down (e.g. switch to cellular).
+            defaultCallback.assertNoCallback();
+            // The system default should still be connected to Wi-fi
+            assertEquals(wifiNetwork, systemDefaultCallback.getLastAvailableNetwork());
+
+            // Cleanup any prior test state from setOemNetworkPreference
+            clearOemNetworkPreference();
+
+            // The default (non-test) network should be available as the network pref was cleared.
+            waitForAvailable(defaultCallback);
+            unregisterTestOemNetworkPreferenceCallbacks(defaultCallback, systemDefaultCallback);
+        }
+    }
+
+    private void unregisterTestOemNetworkPreferenceCallbacks(
+            @NonNull final TestableNetworkCallback defaultCallback,
+            @NonNull final TestableNetworkCallback systemDefaultCallback) {
+        mCm.unregisterNetworkCallback(defaultCallback);
+        mCm.unregisterNetworkCallback(systemDefaultCallback);
+    }
+
+    private void registerTestOemNetworkPreferenceCallbacks(
+            @NonNull final TestableNetworkCallback defaultCallback,
+            @NonNull final TestableNetworkCallback systemDefaultCallback) {
+        mCm.registerDefaultNetworkCallback(defaultCallback);
+        runWithShellPermissionIdentity(() ->
+                mCmShim.registerSystemDefaultNetworkCallback(systemDefaultCallback,
+                        new Handler(Looper.getMainLooper())), NETWORK_SETTINGS);
+    }
+
+    private static final class OnCompleteListenerCallback {
+        final CompletableFuture<Object> mDone = new CompletableFuture<>();
+
+        public void onComplete() {
+            mDone.complete(new Object());
+        }
+
+        void expectOnComplete() throws Exception {
+            try {
+                mDone.get(NETWORK_CALLBACK_TIMEOUT_MS, TimeUnit.MILLISECONDS);
+            } catch (TimeoutException e) {
+                fail("Expected onComplete() not received after "
+                        + NETWORK_CALLBACK_TIMEOUT_MS + " ms");
+            }
+        }
+    }
+
+    private void setOemNetworkPreferenceForMyPackage(final int networkPref) throws Exception {
+        final OemNetworkPreferences pref = new OemNetworkPreferences.Builder()
+                .addNetworkPreference(mContext.getPackageName(), networkPref)
+                .build();
+        final OnCompleteListenerCallback oemPrefListener = new OnCompleteListenerCallback();
+        mUiAutomation.adoptShellPermissionIdentity();
+        try {
+            mCm.setOemNetworkPreference(
+                    pref, mContext.getMainExecutor(), oemPrefListener::onComplete);
+        } finally {
+            mUiAutomation.dropShellPermissionIdentity();
+        }
+        oemPrefListener.expectOnComplete();
+    }
+
+    /**
+     * This will clear the OEM network preference on the device. As there is currently no way of
+     * getting the existing preference, if this is executed while an existing preference is in
+     * place, that preference will need to be reapplied after executing this test.
+     * @throws Exception
+     */
+    private void clearOemNetworkPreference() throws Exception {
+        final OemNetworkPreferences clearPref = new OemNetworkPreferences.Builder().build();
+        final OnCompleteListenerCallback oemPrefListener = new OnCompleteListenerCallback();
+        mUiAutomation.adoptShellPermissionIdentity();
+        try {
+            mCm.setOemNetworkPreference(
+                    clearPref, mContext.getMainExecutor(), oemPrefListener::onComplete);
+        } finally {
+            mUiAutomation.dropShellPermissionIdentity();
+        }
+        oemPrefListener.expectOnComplete();
+    }
 }
diff --git a/tests/cts/net/src/android/net/cts/IpSecAlgorithmImplTest.java b/tests/cts/net/src/android/net/cts/IpSecAlgorithmImplTest.java
index 080f7f9..2f29273 100644
--- a/tests/cts/net/src/android/net/cts/IpSecAlgorithmImplTest.java
+++ b/tests/cts/net/src/android/net/cts/IpSecAlgorithmImplTest.java
@@ -16,9 +16,13 @@
 
 package android.net.cts;
 
+import static android.net.IpSecAlgorithm.AUTH_AES_CMAC;
 import static android.net.IpSecAlgorithm.AUTH_AES_XCBC;
 import static android.net.IpSecAlgorithm.AUTH_CRYPT_CHACHA20_POLY1305;
 import static android.net.IpSecAlgorithm.CRYPT_AES_CTR;
+import static android.net.cts.PacketUtils.AES_CMAC;
+import static android.net.cts.PacketUtils.AES_CMAC_ICV_LEN;
+import static android.net.cts.PacketUtils.AES_CMAC_KEY_LEN;
 import static android.net.cts.PacketUtils.AES_CTR;
 import static android.net.cts.PacketUtils.AES_CTR_BLK_SIZE;
 import static android.net.cts.PacketUtils.AES_CTR_IV_LEN;
@@ -82,7 +86,7 @@
             InetAddress.parseNumericAddress("2001:db8:1::2");
 
     private static final int REMOTE_PORT = 12345;
-    private static final IpSecManager IPSEC_MANAGER =
+    private static final IpSecManager sIpSecManager =
             InstrumentationRegistry.getContext().getSystemService(IpSecManager.class);
 
     private static class CheckCryptoImplTest implements TestNetworkRunnable.Test {
@@ -92,7 +96,7 @@
         private final EspCipher mEspCipher;
         private final EspAuth mEspAuth;
 
-        public CheckCryptoImplTest(
+        CheckCryptoImplTest(
                 IpSecAlgorithm ipsecEncryptAlgo,
                 IpSecAlgorithm ipsecAuthAlgo,
                 IpSecAlgorithm ipsecAeadAlgo,
@@ -145,19 +149,19 @@
                 }
             }
 
-            try (final IpSecManager.SecurityParameterIndex outSpi =
-                            IPSEC_MANAGER.allocateSecurityParameterIndex(REMOTE_ADDRESS);
-                    final IpSecManager.SecurityParameterIndex inSpi =
-                            IPSEC_MANAGER.allocateSecurityParameterIndex(LOCAL_ADDRESS);
-                    final IpSecTransform outTransform =
+            try (IpSecManager.SecurityParameterIndex outSpi =
+                            sIpSecManager.allocateSecurityParameterIndex(REMOTE_ADDRESS);
+                    IpSecManager.SecurityParameterIndex inSpi =
+                            sIpSecManager.allocateSecurityParameterIndex(LOCAL_ADDRESS);
+                    IpSecTransform outTransform =
                             transformBuilder.buildTransportModeTransform(LOCAL_ADDRESS, outSpi);
-                    final IpSecTransform inTransform =
+                    IpSecTransform inTransform =
                             transformBuilder.buildTransportModeTransform(REMOTE_ADDRESS, inSpi);
                     // Bind localSocket to a random available port.
-                    final DatagramSocket localSocket = new DatagramSocket(0)) {
-                IPSEC_MANAGER.applyTransportModeTransform(
+                    DatagramSocket localSocket = new DatagramSocket(0)) {
+                sIpSecManager.applyTransportModeTransform(
                         localSocket, IpSecManager.DIRECTION_IN, inTransform);
-                IPSEC_MANAGER.applyTransportModeTransform(
+                sIpSecManager.applyTransportModeTransform(
                         localSocket, IpSecManager.DIRECTION_OUT, outTransform);
 
                 // Send ESP packet
@@ -170,7 +174,7 @@
                         tunUtils.awaitEspPacket(outSpi.getSpi(), false /* useEncap */);
 
                 // Remove transform for good hygiene
-                IPSEC_MANAGER.removeTransportModeTransforms(localSocket);
+                sIpSecManager.removeTransportModeTransforms(localSocket);
 
                 // Get the kernel-generated ESP payload
                 final byte[] outEspPayload = new byte[outEspPacket.length - IP6_HDRLEN];
@@ -258,6 +262,20 @@
     }
 
     @Test
+    public void testAesCmac() throws Exception {
+        assumeTrue(hasIpSecAlgorithm(AUTH_AES_CMAC));
+
+        final byte[] authKey = getKeyBytes(AES_CMAC_KEY_LEN);
+        final IpSecAlgorithm ipsecAuthAlgo =
+                new IpSecAlgorithm(IpSecAlgorithm.AUTH_AES_CMAC, authKey, AES_CMAC_ICV_LEN * 8);
+        final EspAuth espAuth = new EspAuth(AES_CMAC, authKey, AES_CMAC_ICV_LEN);
+
+        runWithShellPermissionIdentity(new TestNetworkRunnable(new CheckCryptoImplTest(
+                null /* ipsecEncryptAlgo */, ipsecAuthAlgo, null /* ipsecAeadAlgo */,
+                EspCipherNull.getInstance(), espAuth)));
+    }
+
+    @Test
     public void testChaCha20Poly1305() throws Exception {
         assumeTrue(hasIpSecAlgorithm(AUTH_CRYPT_CHACHA20_POLY1305));
 
diff --git a/tests/cts/net/src/android/net/cts/IpSecManagerTest.java b/tests/cts/net/src/android/net/cts/IpSecManagerTest.java
index 5f79a3e..5c95aa3 100644
--- a/tests/cts/net/src/android/net/cts/IpSecManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/IpSecManagerTest.java
@@ -74,7 +74,6 @@
 
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
-import com.android.testutils.SkipPresubmit;
 
 import org.junit.Rule;
 import org.junit.Test;
@@ -771,7 +770,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesCbcHmacMd5Tcp6() throws Exception {
         IpSecAlgorithm crypt = new IpSecAlgorithm(IpSecAlgorithm.CRYPT_AES_CBC, CRYPT_KEY);
         IpSecAlgorithm auth = new IpSecAlgorithm(IpSecAlgorithm.AUTH_HMAC_MD5, getKey(128), 96);
@@ -804,7 +802,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesCbcHmacSha1Tcp6() throws Exception {
         IpSecAlgorithm crypt = new IpSecAlgorithm(IpSecAlgorithm.CRYPT_AES_CBC, CRYPT_KEY);
         IpSecAlgorithm auth = new IpSecAlgorithm(IpSecAlgorithm.AUTH_HMAC_SHA1, getKey(160), 96);
@@ -837,7 +834,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesCbcHmacSha256Tcp6() throws Exception {
         IpSecAlgorithm crypt = new IpSecAlgorithm(IpSecAlgorithm.CRYPT_AES_CBC, CRYPT_KEY);
         IpSecAlgorithm auth = new IpSecAlgorithm(IpSecAlgorithm.AUTH_HMAC_SHA256, getKey(256), 128);
@@ -870,7 +866,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesCbcHmacSha384Tcp6() throws Exception {
         IpSecAlgorithm crypt = new IpSecAlgorithm(IpSecAlgorithm.CRYPT_AES_CBC, CRYPT_KEY);
         IpSecAlgorithm auth = new IpSecAlgorithm(IpSecAlgorithm.AUTH_HMAC_SHA384, getKey(384), 192);
@@ -903,7 +898,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesCbcHmacSha512Tcp6() throws Exception {
         IpSecAlgorithm crypt = new IpSecAlgorithm(IpSecAlgorithm.CRYPT_AES_CBC, CRYPT_KEY);
         IpSecAlgorithm auth = new IpSecAlgorithm(IpSecAlgorithm.AUTH_HMAC_SHA512, getKey(512), 256);
@@ -947,7 +941,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesCtrHmacSha512Tcp6() throws Exception {
         assumeTrue(hasIpSecAlgorithm(CRYPT_AES_CTR));
 
@@ -1002,7 +995,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesCbcAesXCbcTcp6() throws Exception {
         assumeTrue(hasIpSecAlgorithm(AUTH_AES_XCBC));
 
@@ -1043,7 +1035,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesCbcAesCmacTcp6() throws Exception {
         assumeTrue(hasIpSecAlgorithm(AUTH_AES_CMAC));
 
@@ -1082,7 +1073,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesGcm64Tcp6() throws Exception {
         IpSecAlgorithm authCrypt =
                 new IpSecAlgorithm(IpSecAlgorithm.AUTH_CRYPT_AES_GCM, AEAD_KEY, 64);
@@ -1115,7 +1105,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesGcm96Tcp6() throws Exception {
         IpSecAlgorithm authCrypt =
                 new IpSecAlgorithm(IpSecAlgorithm.AUTH_CRYPT_AES_GCM, AEAD_KEY, 96);
@@ -1148,7 +1137,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAesGcm128Tcp6() throws Exception {
         IpSecAlgorithm authCrypt =
                 new IpSecAlgorithm(IpSecAlgorithm.AUTH_CRYPT_AES_GCM, AEAD_KEY, 128);
@@ -1187,7 +1175,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testChaCha20Poly1305Tcp6() throws Exception {
         assumeTrue(hasIpSecAlgorithm(AUTH_CRYPT_CHACHA20_POLY1305));
 
@@ -1463,7 +1450,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testCryptTcp6() throws Exception {
         IpSecAlgorithm crypt = new IpSecAlgorithm(IpSecAlgorithm.CRYPT_AES_CBC, CRYPT_KEY);
         checkTransform(IPPROTO_TCP, IPV6_LOOPBACK, crypt, null, null, false, 1, false);
@@ -1471,7 +1457,6 @@
     }
 
     @Test
-    @SkipPresubmit(reason = "b/186608065 - kernel 5.10 regression in TrafficStats with ipsec")
     public void testAuthTcp6() throws Exception {
         IpSecAlgorithm auth = new IpSecAlgorithm(IpSecAlgorithm.AUTH_HMAC_SHA256, getKey(256), 128);
         checkTransform(IPPROTO_TCP, IPV6_LOOPBACK, null, auth, null, false, 1, false);
diff --git a/tests/cts/net/src/android/net/cts/PacketUtils.java b/tests/cts/net/src/android/net/cts/PacketUtils.java
index 0b3bad4..4d924d1 100644
--- a/tests/cts/net/src/android/net/cts/PacketUtils.java
+++ b/tests/cts/net/src/android/net/cts/PacketUtils.java
@@ -19,6 +19,8 @@
 import static android.system.OsConstants.IPPROTO_IPV6;
 import static android.system.OsConstants.IPPROTO_UDP;
 
+import android.util.ArraySet;
+
 import com.android.internal.net.ipsec.ike.crypto.AesXCbcImpl;
 
 import java.net.Inet4Address;
@@ -29,7 +31,6 @@
 import java.security.GeneralSecurityException;
 import java.security.SecureRandom;
 import java.util.Arrays;
-import java.util.HashSet;
 import java.util.Set;
 
 import javax.crypto.Cipher;
@@ -101,6 +102,7 @@
     static final String HMAC_SHA_256 = "HmacSHA256";
     static final String HMAC_SHA_384 = "HmacSHA384";
     static final String HMAC_SHA_512 = "HmacSHA512";
+    static final String AES_CMAC = "AESCMAC";
     static final String AES_XCBC = "AesXCbc";
 
     public interface Payload {
@@ -501,7 +503,7 @@
         public final byte[] key;
         public final int ivLen;
         public final int saltLen;
-        protected byte[] iv;
+        protected byte[] mIv;
 
         public EspCipher(String algoName, int blockSize, byte[] key, int ivLen, int saltLen) {
             this.algoName = algoName;
@@ -509,11 +511,11 @@
             this.key = key;
             this.ivLen = ivLen;
             this.saltLen = saltLen;
-            this.iv = getIv(ivLen);
+            this.mIv = getIv(ivLen);
         }
 
         public void updateIv(byte[] iv) {
-            this.iv = iv;
+            this.mIv = iv;
         }
 
         public static byte[] getPaddedPayload(int nextHeader, byte[] payload, int blockSize) {
@@ -544,19 +546,19 @@
                 throws GeneralSecurityException;
     }
 
-    public static class EspCipherNull extends EspCipher {
+    public static final class EspCipherNull extends EspCipher {
         private static final String CRYPT_NULL = "CRYPT_NULL";
         private static final int IV_LEN_UNUSED = 0;
         private static final byte[] KEY_UNUSED = new byte[0];
 
-        private static final EspCipherNull INSTANCE = new EspCipherNull();
+        private static final EspCipherNull sInstance = new EspCipherNull();
 
         private EspCipherNull() {
             super(CRYPT_NULL, ESP_BLK_SIZE, KEY_UNUSED, IV_LEN_UNUSED, SALT_LEN_UNUSED);
         }
 
         public static EspCipherNull getInstance() {
-            return INSTANCE;
+            return sInstance;
         }
 
         @Override
@@ -566,7 +568,7 @@
         }
     }
 
-    public static class EspCryptCipher extends EspCipher {
+    public static final class EspCryptCipher extends EspCipher {
         public EspCryptCipher(String algoName, int blockSize, byte[] key, int ivLen) {
             this(algoName, blockSize, key, ivLen, SALT_LEN_UNUSED);
         }
@@ -582,7 +584,7 @@
             final SecretKeySpec secretKeySpec;
 
             if (AES_CBC.equals(algoName)) {
-                ivParameterSpec = new IvParameterSpec(iv);
+                ivParameterSpec = new IvParameterSpec(mIv);
                 secretKeySpec = new SecretKeySpec(key, algoName);
             } else if (AES_CTR.equals(algoName)) {
                 // Provided key consists of encryption/decryption key plus 4-byte salt. Salt is used
@@ -592,9 +594,9 @@
                 secretKeySpec = new SecretKeySpec(secretKey, algoName);
 
                 final ByteBuffer ivParameterBuffer =
-                        ByteBuffer.allocate(iv.length + saltLen + AES_CTR_INITIAL_COUNTER.length);
+                        ByteBuffer.allocate(mIv.length + saltLen + AES_CTR_INITIAL_COUNTER.length);
                 ivParameterBuffer.put(salt);
-                ivParameterBuffer.put(iv);
+                ivParameterBuffer.put(mIv);
                 ivParameterBuffer.put(AES_CTR_INITIAL_COUNTER);
                 ivParameterSpec = new IvParameterSpec(ivParameterBuffer.array());
             } else {
@@ -608,15 +610,15 @@
                     cipher.doFinal(getPaddedPayload(nextHeader, payload, blockSize));
 
             // Build ciphertext
-            final ByteBuffer cipherText = ByteBuffer.allocate(iv.length + encrypted.length);
-            cipherText.put(iv);
+            final ByteBuffer cipherText = ByteBuffer.allocate(mIv.length + encrypted.length);
+            cipherText.put(mIv);
             cipherText.put(encrypted);
 
             return getByteArrayFromBuffer(cipherText);
         }
     }
 
-    public static class EspAeadCipher extends EspCipher {
+    public static final class EspAeadCipher extends EspCipher {
         public final int icvLen;
 
         public EspAeadCipher(
@@ -635,9 +637,9 @@
 
             final SecretKeySpec secretKeySpec = new SecretKeySpec(secretKey, algoName);
 
-            final ByteBuffer ivParameterBuffer = ByteBuffer.allocate(saltLen + iv.length);
+            final ByteBuffer ivParameterBuffer = ByteBuffer.allocate(saltLen + mIv.length);
             ivParameterBuffer.put(salt);
-            ivParameterBuffer.put(iv);
+            ivParameterBuffer.put(mIv);
             final IvParameterSpec ivParameterSpec = new IvParameterSpec(ivParameterBuffer.array());
 
             final ByteBuffer aadBuffer = ByteBuffer.allocate(ESP_HDRLEN);
@@ -653,8 +655,8 @@
 
             // Build ciphertext
             final ByteBuffer cipherText =
-                    ByteBuffer.allocate(iv.length + encryptedTextAndIcv.length);
-            cipherText.put(iv);
+                    ByteBuffer.allocate(mIv.length + encryptedTextAndIcv.length);
+            cipherText.put(mIv);
             cipherText.put(encryptedTextAndIcv);
 
             return getByteArrayFromBuffer(cipherText);
@@ -666,14 +668,15 @@
         public final byte[] key;
         public final int icvLen;
 
-        private static final Set<String> SUPPORTED_HMAC_ALGOS = new HashSet<>();
+        private static final Set<String> JCE_SUPPORTED_MACS = new ArraySet<>();
 
         static {
-            SUPPORTED_HMAC_ALGOS.add(HMAC_MD5);
-            SUPPORTED_HMAC_ALGOS.add(HMAC_SHA1);
-            SUPPORTED_HMAC_ALGOS.add(HMAC_SHA_256);
-            SUPPORTED_HMAC_ALGOS.add(HMAC_SHA_384);
-            SUPPORTED_HMAC_ALGOS.add(HMAC_SHA_512);
+            JCE_SUPPORTED_MACS.add(HMAC_MD5);
+            JCE_SUPPORTED_MACS.add(HMAC_SHA1);
+            JCE_SUPPORTED_MACS.add(HMAC_SHA_256);
+            JCE_SUPPORTED_MACS.add(HMAC_SHA_384);
+            JCE_SUPPORTED_MACS.add(HMAC_SHA_512);
+            JCE_SUPPORTED_MACS.add(AES_CMAC);
         }
 
         public EspAuth(String algoName, byte[] key, int icvLen) {
@@ -686,7 +689,7 @@
             if (AES_XCBC.equals(algoName)) {
                 final Cipher aesCipher = Cipher.getInstance(AES_CBC);
                 return new AesXCbcImpl().mac(key, authenticatedSection, true /* needTruncation */);
-            } else if (SUPPORTED_HMAC_ALGOS.contains(algoName)) {
+            } else if (JCE_SUPPORTED_MACS.contains(algoName)) {
                 final Mac mac = Mac.getInstance(algoName);
                 final SecretKeySpec authKey = new SecretKeySpec(key, algoName);
                 mac.init(authKey);
@@ -701,20 +704,20 @@
         }
     }
 
-    public static class EspAuthNull extends EspAuth {
+    public static final class EspAuthNull extends EspAuth {
         private static final String AUTH_NULL = "AUTH_NULL";
         private static final int ICV_LEN_UNUSED = 0;
         private static final byte[] KEY_UNUSED = new byte[0];
         private static final byte[] ICV_EMPTY = new byte[0];
 
-        private static final EspAuthNull INSTANCE = new EspAuthNull();
+        private static final EspAuthNull sInstance = new EspAuthNull();
 
         private EspAuthNull() {
             super(AUTH_NULL, KEY_UNUSED, ICV_LEN_UNUSED);
         }
 
         public static EspAuthNull getInstance() {
-            return INSTANCE;
+            return sInstance;
         }
 
         @Override
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index eae599d..81c25e6 100644
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -114,6 +114,8 @@
 import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PAID_NO_FALLBACK;
 import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PAID_ONLY;
 import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PRIVATE_ONLY;
+import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST;
+import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST_ONLY;
 import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_UNINITIALIZED;
 import static android.net.RouteInfo.RTN_UNREACHABLE;
 import static android.net.resolv.aidl.IDnsResolverUnsolicitedEventListener.PREFIX_OPERATION_ADDED;
@@ -10758,8 +10760,7 @@
     }
 
     @Test
-    public void testOemNetworkRequestFactoryPreferenceUninitializedThrowsError()
-            throws PackageManager.NameNotFoundException {
+    public void testOemNetworkRequestFactoryPreferenceUninitializedThrowsError() {
         @OemNetworkPreferences.OemNetworkPreference final int prefToTest =
                 OEM_NETWORK_PREFERENCE_UNINITIALIZED;
 
@@ -11026,7 +11027,48 @@
         assertThrows(UnsupportedOperationException.class,
                 () -> mService.setOemNetworkPreference(
                         createDefaultOemNetworkPreferences(networkPref),
-                        new TestOemListenerCallback()));
+                        null));
+    }
+
+    @Test
+    public void testSetOemNetworkPreferenceFailsForTestRequestWithoutPermission() {
+        // Calling setOemNetworkPreference() with a test pref requires the permission
+        // MANAGE_TEST_NETWORKS.
+        mockHasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE, false);
+        @OemNetworkPreferences.OemNetworkPreference final int networkPref =
+                OEM_NETWORK_PREFERENCE_TEST;
+
+        // Act on ConnectivityService.setOemNetworkPreference()
+        assertThrows(SecurityException.class,
+                () -> mService.setOemNetworkPreference(
+                        createDefaultOemNetworkPreferences(networkPref),
+                        null));
+    }
+
+    @Test
+    public void testSetOemNetworkPreferenceFailsForInvalidTestRequest() {
+        assertSetOemNetworkPreferenceFailsForInvalidTestRequest(OEM_NETWORK_PREFERENCE_TEST);
+    }
+
+    @Test
+    public void testSetOemNetworkPreferenceFailsForInvalidTestOnlyRequest() {
+        assertSetOemNetworkPreferenceFailsForInvalidTestRequest(OEM_NETWORK_PREFERENCE_TEST_ONLY);
+    }
+
+    private void assertSetOemNetworkPreferenceFailsForInvalidTestRequest(
+            @OemNetworkPreferences.OemNetworkPreference final int oemNetworkPreferenceForTest) {
+        mockHasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE, true);
+        final String secondPackage = "does.not.matter";
+
+        // A valid test request would only have a single mapping.
+        final OemNetworkPreferences pref = new OemNetworkPreferences.Builder()
+                .addNetworkPreference(TEST_PACKAGE_NAME, oemNetworkPreferenceForTest)
+                .addNetworkPreference(secondPackage, oemNetworkPreferenceForTest)
+                .build();
+
+        // Act on ConnectivityService.setOemNetworkPreference()
+        assertThrows(IllegalArgumentException.class,
+                () -> mService.setOemNetworkPreference(pref, null));
     }
 
     private void setOemNetworkPreferenceAgentConnected(final int transportType,
@@ -11203,8 +11245,18 @@
     private void setupSetOemNetworkPreferenceForPreferenceTest(
             @OemNetworkPreferences.OemNetworkPreference final int networkPrefToSetup,
             @NonNull final UidRangeParcel[] uidRanges,
-            @NonNull final String testPackageName)
-            throws Exception {
+            @NonNull final String testPackageName) throws Exception {
+        setupSetOemNetworkPreferenceForPreferenceTest(
+                networkPrefToSetup, uidRanges, testPackageName, true);
+    }
+
+    private void setupSetOemNetworkPreferenceForPreferenceTest(
+            @OemNetworkPreferences.OemNetworkPreference final int networkPrefToSetup,
+            @NonNull final UidRangeParcel[] uidRanges,
+            @NonNull final String testPackageName,
+            final boolean hasAutomotiveFeature) throws Exception {
+        mockHasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE, hasAutomotiveFeature);
+
         // These tests work off a single UID therefore using 'start' is valid.
         mockGetApplicationInfo(testPackageName, uidRanges[0].start);
 
@@ -11509,6 +11561,55 @@
     }
 
     /**
+     * Test the tracked default requests allows test requests without standard setup.
+     */
+    @Test
+    public void testSetOemNetworkPreferenceAllowsValidTestRequestWithoutChecks() throws Exception {
+        @OemNetworkPreferences.OemNetworkPreference int networkPref =
+                OEM_NETWORK_PREFERENCE_TEST;
+        validateSetOemNetworkPreferenceAllowsValidTestPrefRequest(networkPref);
+    }
+
+    /**
+     * Test the tracked default requests allows test only requests without standard setup.
+     */
+    @Test
+    public void testSetOemNetworkPreferenceAllowsValidTestOnlyRequestWithoutChecks()
+            throws Exception {
+        @OemNetworkPreferences.OemNetworkPreference int networkPref =
+                OEM_NETWORK_PREFERENCE_TEST_ONLY;
+        validateSetOemNetworkPreferenceAllowsValidTestPrefRequest(networkPref);
+    }
+
+    private void validateSetOemNetworkPreferenceAllowsValidTestPrefRequest(int networkPref)
+            throws Exception {
+        // The caller must have the MANAGE_TEST_NETWORKS permission.
+        final int testPackageUid = 123;
+        final String validTestPackageName = "does.not.matter";
+        final UidRangeParcel[] uidRanges =
+                toUidRangeStableParcels(uidRangesForUids(testPackageUid));
+        mServiceContext.setPermission(
+                Manifest.permission.MANAGE_TEST_NETWORKS, PERMISSION_GRANTED);
+
+        // Put the system into a state in which setOemNetworkPreference() would normally fail. This
+        // will confirm that a valid test request can bypass these checks.
+        mockHasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE, false);
+        mServiceContext.setPermission(
+                Manifest.permission.CONTROL_OEM_PAID_NETWORK_PREFERENCE, PERMISSION_DENIED);
+
+        // Validate the starting requests only includes the system default request.
+        assertEquals(1, mService.mDefaultNetworkRequests.size());
+
+        // Add an OEM default network request to track.
+        setupSetOemNetworkPreferenceForPreferenceTest(
+                networkPref, uidRanges, validTestPackageName,
+                false /* hasAutomotiveFeature */);
+
+        // Two requests should now exist; the system default and the test request.
+        assertEquals(2, mService.mDefaultNetworkRequests.size());
+    }
+
+    /**
      * Test the tracked default requests clear previous OEM requests on setOemNetworkPreference().
      */
     @Test
@@ -11520,7 +11621,7 @@
         final UidRangeParcel[] uidRanges =
                 toUidRangeStableParcels(uidRangesForUids(testPackageUid));
 
-        // Validate the starting requests only includes the fallback request.
+        // Validate the starting requests only includes the system default request.
         assertEquals(1, mService.mDefaultNetworkRequests.size());
 
         // Add an OEM default network request to track.