diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 58cd7cc..48ae7a0 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -80,6 +80,8 @@
 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;
@@ -2630,6 +2632,12 @@
                 "ConnectivityService");
     }
 
+    private void enforceManageTestNetworksPermission() {
+        mContext.enforceCallingOrSelfPermission(
+                android.Manifest.permission.MANAGE_TEST_NETWORKS,
+                "ConnectivityService");
+    }
+
     private boolean checkNetworkStackPermission() {
         return checkAnyPermissionOf(
                 android.Manifest.permission.NETWORK_STACK,
@@ -9926,8 +9934,15 @@
             @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()) {
@@ -9939,18 +9954,41 @@
             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.");
             }
         }
     }
@@ -10174,13 +10212,21 @@
                 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));
             }
@@ -10213,10 +10259,17 @@
         }
 
         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/common/java/android/net/NetworkAgentConfigTest.kt b/tests/common/java/android/net/NetworkAgentConfigTest.kt
index 2b45b3d..afaae1c 100644
--- a/tests/common/java/android/net/NetworkAgentConfigTest.kt
+++ b/tests/common/java/android/net/NetworkAgentConfigTest.kt
@@ -59,6 +59,7 @@
 
     @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
     fun testBuilder() {
+        val testExtraInfo = "mylegacyExtraInfo"
         val config = NetworkAgentConfig.Builder().apply {
             setExplicitlySelected(true)
             setLegacyType(ConnectivityManager.TYPE_ETHERNET)
@@ -67,6 +68,7 @@
             setUnvalidatedConnectivityAcceptable(true)
             setLegacyTypeName("TEST_NETWORK")
             if (isAtLeastS()) {
+                setLegacyExtraInfo(testExtraInfo)
                 setNat64DetectionEnabled(false)
                 setProvisioningNotificationEnabled(false)
                 setBypassableVpn(true)
@@ -80,6 +82,7 @@
         assertTrue(config.isUnvalidatedConnectivityAcceptable())
         assertEquals("TEST_NETWORK", config.getLegacyTypeName())
         if (isAtLeastS()) {
+            assertEquals(testExtraInfo, config.getLegacyExtraInfo())
             assertFalse(config.isNat64DetectionEnabled())
             assertFalse(config.isProvisioningNotificationEnabled())
             assertTrue(config.isBypassableVpn())
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index acec9a4..ae59dc4 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -152,6 +152,7 @@
 import com.android.networkstack.apishim.common.ConnectivityManagerShim;
 import com.android.testutils.CompatUtil;
 import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import com.android.testutils.DevSdkIgnoreRuleKt;
 import com.android.testutils.RecorderCallback.CallbackEntry;
 import com.android.testutils.SkipPresubmit;
@@ -674,6 +675,31 @@
                 .build();
     }
 
+    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
+    public void testIsPrivateDnsBroken() throws InterruptedException {
+        final String invalidPrivateDnsServer = "invalidhostname.example.com";
+        final String goodPrivateDnsServer = "dns.google";
+        mCtsNetUtils.storePrivateDnsSetting();
+        final TestableNetworkCallback cb = new TestableNetworkCallback();
+        mCm.registerNetworkCallback(makeWifiNetworkRequest(), cb);
+        try {
+            // Verifying the good private DNS sever
+            mCtsNetUtils.setPrivateDnsStrictMode(goodPrivateDnsServer);
+            final Network networkForPrivateDns =  mCtsNetUtils.ensureWifiConnected();
+            cb.eventuallyExpect(CallbackEntry.NETWORK_CAPS_UPDATED, NETWORK_CALLBACK_TIMEOUT_MS,
+                    entry -> (!((CallbackEntry.CapabilitiesChanged) entry).getCaps()
+                    .isPrivateDnsBroken()) && networkForPrivateDns.equals(entry.getNetwork()));
+
+            // Verifying the broken private DNS sever
+            mCtsNetUtils.setPrivateDnsStrictMode(invalidPrivateDnsServer);
+            cb.eventuallyExpect(CallbackEntry.NETWORK_CAPS_UPDATED, NETWORK_CALLBACK_TIMEOUT_MS,
+                    entry -> (((CallbackEntry.CapabilitiesChanged) entry).getCaps()
+                    .isPrivateDnsBroken()) && networkForPrivateDns.equals(entry.getNetwork()));
+        } finally {
+            mCtsNetUtils.restorePrivateDnsSetting();
+        }
+    }
+
     /**
      * Exercises both registerNetworkCallback and unregisterNetworkCallback. This checks to
      * see if we get a callback for the TRANSPORT_WIFI transport type being available.
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index 308b038..4530650 100644
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -109,6 +109,8 @@
 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;
@@ -10715,8 +10717,7 @@
     }
 
     @Test
-    public void testOemNetworkRequestFactoryPreferenceUninitializedThrowsError()
-            throws PackageManager.NameNotFoundException {
+    public void testOemNetworkRequestFactoryPreferenceUninitializedThrowsError() {
         @OemNetworkPreferences.OemNetworkPreference final int prefToTest =
                 OEM_NETWORK_PREFERENCE_UNINITIALIZED;
 
@@ -10983,7 +10984,48 @@
         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,
@@ -11160,8 +11202,18 @@
     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);
 
@@ -11466,6 +11518,55 @@
     }
 
     /**
+     * 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
@@ -11477,7 +11578,7 @@
         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.