diff --git a/Tethering/src/com/android/networkstack/tethering/Tethering.java b/Tethering/src/com/android/networkstack/tethering/Tethering.java
index 952325cc43..b2a43c47d1 100644
--- a/Tethering/src/com/android/networkstack/tethering/Tethering.java
+++ b/Tethering/src/com/android/networkstack/tethering/Tethering.java
@@ -62,7 +62,6 @@ import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
 
 import static com.android.networkstack.tethering.TetheringNotificationUpdater.DOWNSTREAM_NONE;
 
-import android.app.usage.NetworkStatsManager;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothPan;
 import android.bluetooth.BluetoothProfile;
@@ -268,12 +267,9 @@ public class Tethering {
         mTetherMasterSM = new TetherMasterSM("TetherMaster", mLooper, deps);
         mTetherMasterSM.start();
 
-        final NetworkStatsManager statsManager =
-                (NetworkStatsManager) mContext.getSystemService(Context.NETWORK_STATS_SERVICE);
         mHandler = mTetherMasterSM.getHandler();
-        mOffloadController = new OffloadController(mHandler,
-                mDeps.getOffloadHardwareInterface(mHandler, mLog), mContext.getContentResolver(),
-                statsManager, mLog, new OffloadController.Dependencies() {
+        mOffloadController = mDeps.getOffloadController(mHandler, mLog,
+                new OffloadController.Dependencies() {
 
                     @Override
                     public TetheringConfiguration getTetherConfig() {
diff --git a/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java b/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java
index 9b54b5ff24..802f2acb33 100644
--- a/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java
+++ b/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java
@@ -16,6 +16,7 @@
 
 package com.android.networkstack.tethering;
 
+import android.app.usage.NetworkStatsManager;
 import android.bluetooth.BluetoothAdapter;
 import android.content.Context;
 import android.net.INetd;
@@ -46,6 +47,19 @@ public abstract class TetheringDependencies {
         return new OffloadHardwareInterface(h, log);
     }
 
+    /**
+     * Get a reference to the offload controller to be used by tethering.
+     */
+    @NonNull
+    public OffloadController getOffloadController(@NonNull Handler h,
+            @NonNull SharedLog log, @NonNull OffloadController.Dependencies deps) {
+        final NetworkStatsManager statsManager =
+                (NetworkStatsManager) getContext().getSystemService(Context.NETWORK_STATS_SERVICE);
+        return new OffloadController(h, getOffloadHardwareInterface(h, log),
+                getContext().getContentResolver(), statsManager, log, deps);
+    }
+
+
     /**
      * Get a reference to the UpstreamNetworkMonitor to be used by tethering.
      */
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
index 0363f5f998..fff7a70f54 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
@@ -150,6 +150,8 @@ import org.mockito.ArgumentCaptor;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
 import java.net.Inet4Address;
 import java.net.Inet6Address;
 import java.util.ArrayList;
@@ -212,6 +214,9 @@ public class TetheringTest {
     private Tethering mTethering;
     private PhoneStateListener mPhoneStateListener;
     private InterfaceConfigurationParcel mInterfaceConfiguration;
+    private TetheringConfiguration mConfig;
+    private EntitlementManager mEntitleMgr;
+    private OffloadController mOffloadCtrl;
 
     private class TestContext extends BroadcastInterceptingContext {
         TestContext(Context base) {
@@ -297,8 +302,9 @@ public class TetheringTest {
         }
     }
 
-    private class MockTetheringConfiguration extends TetheringConfiguration {
-        MockTetheringConfiguration(Context ctx, SharedLog log, int id) {
+    // MyTetheringConfiguration is used to override static method for testing.
+    private class MyTetheringConfiguration extends TetheringConfiguration {
+        MyTetheringConfiguration(Context ctx, SharedLog log, int id) {
             super(ctx, log, id);
         }
 
@@ -327,6 +333,15 @@ public class TetheringTest {
             return mOffloadHardwareInterface;
         }
 
+        @Override
+        public OffloadController getOffloadController(Handler h, SharedLog log,
+                OffloadController.Dependencies deps) {
+            mOffloadCtrl = spy(super.getOffloadController(h, log, deps));
+            // Return real object here instead of mock because
+            // testReportFailCallbackIfOffloadNotSupported depend on real OffloadController object.
+            return mOffloadCtrl;
+        }
+
         @Override
         public UpstreamNetworkMonitor getUpstreamNetworkMonitor(Context ctx,
                 StateMachine target, SharedLog log, int what) {
@@ -351,6 +366,13 @@ public class TetheringTest {
             return mNetworkRequest;
         }
 
+        @Override
+        public EntitlementManager getEntitlementManager(Context ctx, StateMachine target,
+                SharedLog log, int what) {
+            mEntitleMgr = spy(super.getEntitlementManager(ctx, target, log, what));
+            return mEntitleMgr;
+        }
+
         @Override
         public boolean isTetheringSupported() {
             return true;
@@ -359,7 +381,8 @@ public class TetheringTest {
         @Override
         public TetheringConfiguration generateTetheringConfiguration(Context ctx, SharedLog log,
                 int subId) {
-            return new MockTetheringConfiguration(ctx, log, subId);
+            mConfig = spy(new MyTetheringConfiguration(ctx, log, subId));
+            return mConfig;
         }
 
         @Override
@@ -1726,6 +1749,17 @@ public class TetheringTest {
         verify(mNotificationUpdater, never()).onUpstreamCapabilitiesChanged(any());
     }
 
+    @Test
+    public void testDumpTetheringLog() throws Exception {
+        final FileDescriptor mockFd = mock(FileDescriptor.class);
+        final PrintWriter mockPw = mock(PrintWriter.class);
+        runUsbTethering(null);
+        mTethering.dump(mockFd, mockPw, new String[0]);
+        verify(mConfig).dump(any());
+        verify(mEntitleMgr).dump(any());
+        verify(mOffloadCtrl).dump(any());
+    }
+
     // TODO: Test that a request for hotspot mode doesn't interfere with an
     // already operating tethering mode interface.
 }