diff --git a/services/core/java/com/android/server/biometrics/sensors/fingerprint/hidl/Fingerprint21.java b/services/core/java/com/android/server/biometrics/sensors/fingerprint/hidl/Fingerprint21.java
index acc575fb19731..a4a84019bae76 100644
--- a/services/core/java/com/android/server/biometrics/sensors/fingerprint/hidl/Fingerprint21.java
+++ b/services/core/java/com/android/server/biometrics/sensors/fingerprint/hidl/Fingerprint21.java
@@ -47,6 +47,7 @@ import android.util.Slog;
 import android.util.proto.ProtoOutputStream;
 
 import com.android.internal.R;
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.FrameworkStatsLog;
 import com.android.server.biometrics.SensorServiceStateProto;
 import com.android.server.biometrics.SensorStateProto;
@@ -397,7 +398,8 @@ public class Fingerprint21 implements IHwBinder.DeathRecipient, ServiceProvider
         });
     }
 
-    private synchronized IBiometricsFingerprint getDaemon() {
+    @VisibleForTesting
+    synchronized IBiometricsFingerprint getDaemon() {
         if (mTestHalEnabled) {
             final TestHal testHal = new TestHal();
             testHal.setNotify(mHalResultController);
diff --git a/services/tests/servicestests/src/com/android/server/biometrics/sensors/fingerprint/hidl/Fingerprint21Test.java b/services/tests/servicestests/src/com/android/server/biometrics/sensors/fingerprint/hidl/Fingerprint21Test.java
index 61cc8e6e8ea30..904ade82a51f9 100644
--- a/services/tests/servicestests/src/com/android/server/biometrics/sensors/fingerprint/hidl/Fingerprint21Test.java
+++ b/services/tests/servicestests/src/com/android/server/biometrics/sensors/fingerprint/hidl/Fingerprint21Test.java
@@ -19,17 +19,20 @@ package com.android.server.biometrics.sensors.fingerprint.hidl;
 import static junit.framework.Assert.assertEquals;
 
 import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import android.content.Context;
 import android.content.res.Resources;
 import android.hardware.biometrics.BiometricManager;
+import android.hardware.biometrics.fingerprint.V2_1.IBiometricsFingerprint;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.UserManager;
 import android.platform.test.annotations.Presubmit;
 
+import androidx.annotation.NonNull;
 import androidx.test.InstrumentationRegistry;
 import androidx.test.filters.SmallTest;
 
@@ -80,7 +83,7 @@ public class Fingerprint21Test {
                 .thenReturn(5);
 
         mLockoutResetDispatcher = new LockoutResetDispatcher(mContext);
-        mFingerprint21 = new Fingerprint21(mContext, mScheduler,
+        mFingerprint21 = new TestableFingerprint21(mContext, mScheduler,
                 new Handler(Looper.getMainLooper()), SENSOR_ID,
                 BiometricManager.Authenticators.BIOMETRIC_WEAK, mLockoutResetDispatcher,
                 mHalResultController);
@@ -100,4 +103,21 @@ public class Fingerprint21Test {
         waitForIdle();
         verify(mScheduler).reset();
     }
+
+    private static class TestableFingerprint21 extends Fingerprint21 {
+
+        TestableFingerprint21(@NonNull Context context,
+                @NonNull BiometricScheduler scheduler,
+                @NonNull Handler handler, int sensorId, int strength,
+                @NonNull LockoutResetDispatcher lockoutResetDispatcher,
+                @NonNull HalResultController controller) {
+            super(context, scheduler, handler, sensorId, strength, lockoutResetDispatcher,
+                    controller);
+        }
+
+        @Override
+        synchronized IBiometricsFingerprint getDaemon() {
+            return mock(IBiometricsFingerprint.class);
+        }
+    }
 }