diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 66e39be..a8d925f 100755
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -1362,8 +1362,8 @@
         /**
          * Create a HandlerThread to use in ConnectivityService.
          */
-        public HandlerThread makeHandlerThread() {
-            return new HandlerThread("ConnectivityServiceThread");
+        public HandlerThread makeHandlerThread(@NonNull final String tag) {
+            return new HandlerThread(tag);
         }
 
         /**
@@ -1458,7 +1458,7 @@
         public CarrierPrivilegeAuthenticator makeCarrierPrivilegeAuthenticator(
                 @NonNull final Context context, @NonNull final TelephonyManager tm) {
             if (isAtLeastT()) {
-                return new CarrierPrivilegeAuthenticator(context, this, tm);
+                return new CarrierPrivilegeAuthenticator(context, tm);
             } else {
                 return null;
             }
@@ -1706,7 +1706,7 @@
 
         mNetd = netd;
         mBpfNetMaps = mDeps.getBpfNetMaps(mContext, netd);
-        mHandlerThread = mDeps.makeHandlerThread();
+        mHandlerThread = mDeps.makeHandlerThread("ConnectivityServiceThread");
         mPermissionMonitor =
                 new PermissionMonitor(mContext, mNetd, mBpfNetMaps, mHandlerThread);
         mHandlerThread.start();
diff --git a/service/src/com/android/server/connectivity/CarrierPrivilegeAuthenticator.java b/service/src/com/android/server/connectivity/CarrierPrivilegeAuthenticator.java
index 8edceb0..a39345e 100644
--- a/service/src/com/android/server/connectivity/CarrierPrivilegeAuthenticator.java
+++ b/service/src/com/android/server/connectivity/CarrierPrivilegeAuthenticator.java
@@ -43,11 +43,11 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.modules.utils.HandlerExecutor;
+import com.android.net.module.util.DeviceConfigUtils;
 import com.android.networkstack.apishim.TelephonyManagerShimImpl;
 import com.android.networkstack.apishim.common.TelephonyManagerShim;
 import com.android.networkstack.apishim.common.TelephonyManagerShim.CarrierPrivilegesListenerShim;
 import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
-import com.android.server.ConnectivityService;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -78,13 +78,13 @@
     private final boolean mUseCallbacksForServiceChanged;
 
     public CarrierPrivilegeAuthenticator(@NonNull final Context c,
-            @NonNull final ConnectivityService.Dependencies deps,
+            @NonNull final Dependencies deps,
             @NonNull final TelephonyManager t,
             @NonNull final TelephonyManagerShim telephonyManagerShim) {
         mContext = c;
         mTelephonyManager = t;
         mTelephonyManagerShim = telephonyManagerShim;
-        final HandlerThread thread = new HandlerThread(TAG);
+        final HandlerThread thread = deps.makeHandlerThread();
         thread.start();
         mHandler = new Handler(thread.getLooper());
         mUseCallbacksForServiceChanged = deps.isFeatureEnabled(
@@ -110,9 +110,24 @@
     }
 
     public CarrierPrivilegeAuthenticator(@NonNull final Context c,
-            @NonNull final ConnectivityService.Dependencies deps,
             @NonNull final TelephonyManager t) {
-        this(c, deps, t, TelephonyManagerShimImpl.newInstance(t));
+        this(c, new Dependencies(), t, TelephonyManagerShimImpl.newInstance(t));
+    }
+
+    public static class Dependencies {
+        /**
+         * Create a HandlerThread to use in CarrierPrivilegeAuthenticator.
+         */
+        public HandlerThread makeHandlerThread() {
+            return new HandlerThread(TAG);
+        }
+
+        /**
+         * @see DeviceConfigUtils#isTetheringFeatureEnabled
+         */
+        public boolean isFeatureEnabled(Context context, String name) {
+            return DeviceConfigUtils.isTetheringFeatureEnabled(context, name);
+        }
     }
 
     private void simConfigChanged() {
diff --git a/service/src/com/android/server/connectivity/ConnectivityFlags.java b/service/src/com/android/server/connectivity/ConnectivityFlags.java
index 5aac8f1..f8f76ef 100644
--- a/service/src/com/android/server/connectivity/ConnectivityFlags.java
+++ b/service/src/com/android/server/connectivity/ConnectivityFlags.java
@@ -33,7 +33,6 @@
     public static final String NO_REMATCH_ALL_REQUESTS_ON_REGISTER =
             "no_rematch_all_requests_on_register";
 
-    @VisibleForTesting
     public static final String CARRIER_SERVICE_CHANGED_USE_CALLBACK =
             "carrier_service_changed_use_callback_version";
 
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index 125707f..9470a08 100755
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -1991,7 +1991,7 @@
         }
 
         @Override
-        public HandlerThread makeHandlerThread() {
+        public HandlerThread makeHandlerThread(@NonNull final String tag) {
             return mCsHandlerThread;
         }
 
diff --git a/tests/unit/java/com/android/server/connectivity/CarrierPrivilegeAuthenticatorTest.java b/tests/unit/java/com/android/server/connectivity/CarrierPrivilegeAuthenticatorTest.java
index 8113626..12324d8 100644
--- a/tests/unit/java/com/android/server/connectivity/CarrierPrivilegeAuthenticatorTest.java
+++ b/tests/unit/java/com/android/server/connectivity/CarrierPrivilegeAuthenticatorTest.java
@@ -45,6 +45,7 @@
 import android.net.NetworkCapabilities;
 import android.net.TelephonyNetworkSpecifier;
 import android.os.Build;
+import android.os.HandlerThread;
 import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
 
@@ -52,10 +53,11 @@
 import com.android.networkstack.apishim.TelephonyManagerShimImpl;
 import com.android.networkstack.apishim.common.TelephonyManagerShim.CarrierPrivilegesListenerShim;
 import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
-import com.android.server.ConnectivityService;
+import com.android.server.connectivity.CarrierPrivilegeAuthenticator.Dependencies;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import com.android.testutils.DevSdkIgnoreRunner;
 
+import org.junit.After;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -86,10 +88,11 @@
     private final int mCarrierConfigPkgUid = 12345;
     private final String mTestPkg = "com.android.server.connectivity.test";
     private final BroadcastReceiver mMultiSimBroadcastReceiver;
+    @NonNull private final HandlerThread mHandlerThread;
 
     public class TestCarrierPrivilegeAuthenticator extends CarrierPrivilegeAuthenticator {
         TestCarrierPrivilegeAuthenticator(@NonNull final Context c,
-                @NonNull final ConnectivityService.Dependencies deps,
+                @NonNull final Dependencies deps,
                 @NonNull final TelephonyManager t) {
             super(c, deps, t, mTelephonyManagerShim);
         }
@@ -100,6 +103,11 @@
         }
     }
 
+    @After
+    public void tearDown() {
+        mHandlerThread.quit();
+    }
+
     /** Parameters to test both using callbacks or the old broadcast */
     @Parameterized.Parameters
     public static Collection<Boolean> shouldUseCallbacks() {
@@ -111,9 +119,11 @@
         mTelephonyManager = mock(TelephonyManager.class);
         mTelephonyManagerShim = mock(TelephonyManagerShimImpl.class);
         mPackageManager = mock(PackageManager.class);
-        final ConnectivityService.Dependencies deps = mock(ConnectivityService.Dependencies.class);
+        mHandlerThread = new HandlerThread(CarrierPrivilegeAuthenticatorTest.class.getSimpleName());
+        final Dependencies deps = mock(Dependencies.class);
         doReturn(useCallbacks).when(deps).isFeatureEnabled(any() /* context */,
                 eq(CARRIER_SERVICE_CHANGED_USE_CALLBACK));
+        doReturn(mHandlerThread).when(deps).makeHandlerThread();
         doReturn(SUBSCRIPTION_COUNT).when(mTelephonyManager).getActiveModemCount();
         doReturn(mTestPkg).when(mTelephonyManagerShim)
                 .getCarrierServicePackageNameForLogicalSlot(anyInt());
diff --git a/tests/unit/java/com/android/server/connectivityservice/base/CSTest.kt b/tests/unit/java/com/android/server/connectivityservice/base/CSTest.kt
index 4f5cfc0..f4c62c5 100644
--- a/tests/unit/java/com/android/server/connectivityservice/base/CSTest.kt
+++ b/tests/unit/java/com/android/server/connectivityservice/base/CSTest.kt
@@ -176,7 +176,7 @@
         override fun getClatCoordinator(netd: INetd?) = this@CSTest.clatCoordinator
         override fun getNetworkStack() = this@CSTest.networkStack
 
-        override fun makeHandlerThread() = csHandlerThread
+        override fun makeHandlerThread(tag: String) = csHandlerThread
         override fun makeProxyTracker(context: Context, connServiceHandler: Handler) = proxyTracker
 
         override fun makeCarrierPrivilegeAuthenticator(