diff --git a/services/core/java/com/android/server/connectivity/Tethering.java b/services/core/java/com/android/server/connectivity/Tethering.java
index 0beb227e58253..6d96a1015aa23 100644
--- a/services/core/java/com/android/server/connectivity/Tethering.java
+++ b/services/core/java/com/android/server/connectivity/Tethering.java
@@ -71,6 +71,7 @@ import com.android.internal.util.State;
 import com.android.internal.util.StateMachine;
 import com.android.server.connectivity.tethering.IControlsTethering;
 import com.android.server.connectivity.tethering.IPv6TetheringCoordinator;
+import com.android.server.connectivity.tethering.IPv6TetheringInterfaceServices;
 import com.android.server.connectivity.tethering.TetherInterfaceStateMachine;
 import com.android.server.net.BaseNetworkObserver;
 
@@ -1939,7 +1940,8 @@ public class Tethering extends BaseNetworkObserver implements IControlsTethering
     private void trackNewTetherableInterface(String iface, int interfaceType) {
         TetherState tetherState;
         tetherState = new TetherState(new TetherInterfaceStateMachine(iface, mLooper,
-                interfaceType, mNMService, mStatsService, this));
+                interfaceType, mNMService, mStatsService, this,
+                new IPv6TetheringInterfaceServices(iface, mNMService)));
         mTetherStates.put(iface, tetherState);
         tetherState.mStateMachine.start();
     }
diff --git a/services/core/java/com/android/server/connectivity/tethering/IPv6TetheringInterfaceServices.java b/services/core/java/com/android/server/connectivity/tethering/IPv6TetheringInterfaceServices.java
index c2c1a8c5fef7f..dec2f77b64559 100644
--- a/services/core/java/com/android/server/connectivity/tethering/IPv6TetheringInterfaceServices.java
+++ b/services/core/java/com/android/server/connectivity/tethering/IPv6TetheringInterfaceServices.java
@@ -45,7 +45,7 @@ import java.util.Objects;
 /**
  * @hide
  */
-class IPv6TetheringInterfaceServices {
+public class IPv6TetheringInterfaceServices {
     private static final String TAG = IPv6TetheringInterfaceServices.class.getSimpleName();
     private static final IpPrefix LINK_LOCAL_PREFIX = new IpPrefix("fe80::/64");
     private static final int RFC7421_IP_PREFIX_LENGTH = 64;
@@ -59,7 +59,7 @@ class IPv6TetheringInterfaceServices {
     private RouterAdvertisementDaemon mRaDaemon;
     private RaParams mLastRaParams;
 
-    IPv6TetheringInterfaceServices(String ifname, INetworkManagementService nms) {
+    public IPv6TetheringInterfaceServices(String ifname, INetworkManagementService nms) {
         mIfName = ifname;
         mNMService = nms;
     }
diff --git a/services/core/java/com/android/server/connectivity/tethering/TetherInterfaceStateMachine.java b/services/core/java/com/android/server/connectivity/tethering/TetherInterfaceStateMachine.java
index 6ca4e271ec55b..37221a971ad19 100644
--- a/services/core/java/com/android/server/connectivity/tethering/TetherInterfaceStateMachine.java
+++ b/services/core/java/com/android/server/connectivity/tethering/TetherInterfaceStateMachine.java
@@ -94,14 +94,14 @@ public class TetherInterfaceStateMachine extends StateMachine {
 
     public TetherInterfaceStateMachine(String ifaceName, Looper looper, int interfaceType,
                     INetworkManagementService nMService, INetworkStatsService statsService,
-                    IControlsTethering tetherController) {
+                    IControlsTethering tetherController, IPv6TetheringInterfaceServices ipv6Svc) {
         super(ifaceName, looper);
         mNMService = nMService;
         mStatsService = statsService;
         mTetherController = tetherController;
         mIfaceName = ifaceName;
         mInterfaceType = interfaceType;
-        mIPv6TetherSvc = new IPv6TetheringInterfaceServices(mIfaceName, mNMService);
+        mIPv6TetherSvc = ipv6Svc;
         mLastError = ConnectivityManager.TETHER_ERROR_NO_ERROR;
 
         mInitialState = new InitialState();
diff --git a/tests/net/java/com/android/server/connectivity/tethering/TetherInterfaceStateMachineTest.java b/tests/net/java/com/android/server/connectivity/tethering/TetherInterfaceStateMachineTest.java
index a30b3629d5c43..9f7261dc6019d 100644
--- a/tests/net/java/com/android/server/connectivity/tethering/TetherInterfaceStateMachineTest.java
+++ b/tests/net/java/com/android/server/connectivity/tethering/TetherInterfaceStateMachineTest.java
@@ -59,13 +59,14 @@ public class TetherInterfaceStateMachineTest {
     @Mock private INetworkStatsService mStatsService;
     @Mock private IControlsTethering mTetherHelper;
     @Mock private InterfaceConfiguration mInterfaceConfiguration;
+    @Mock private IPv6TetheringInterfaceServices mIPv6TetheringInterfaceServices;
 
     private final TestLooper mLooper = new TestLooper();
     private TetherInterfaceStateMachine mTestedSm;
 
     private void initStateMachine(int interfaceType) throws Exception {
         mTestedSm = new TetherInterfaceStateMachine(IFACE_NAME, mLooper.getLooper(), interfaceType,
-                mNMService, mStatsService, mTetherHelper);
+                mNMService, mStatsService, mTetherHelper, mIPv6TetheringInterfaceServices);
         mTestedSm.start();
         // Starting the state machine always puts us in a consistent state and notifies
         // the test of the world that we've changed from an unknown to available state.
@@ -91,7 +92,8 @@ public class TetherInterfaceStateMachineTest {
     @Test
     public void startsOutAvailable() {
         mTestedSm = new TetherInterfaceStateMachine(IFACE_NAME, mLooper.getLooper(),
-                ConnectivityManager.TETHERING_BLUETOOTH, mNMService, mStatsService, mTetherHelper);
+                ConnectivityManager.TETHERING_BLUETOOTH, mNMService, mStatsService, mTetherHelper,
+                mIPv6TetheringInterfaceServices);
         mTestedSm.start();
         mLooper.dispatchAll();
         verify(mTetherHelper).notifyInterfaceStateChange(
@@ -274,4 +276,4 @@ public class TetherInterfaceStateMachineTest {
                 upstreamIface);
         mLooper.dispatchAll();
     }
-}
\ No newline at end of file
+}