diff --git a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
index 258819f..4a9e41e 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
@@ -762,6 +762,12 @@
         return mGlobalLock;
     }
 
+    /** For test purpose only. */
+    @VisibleForTesting
+    public ActivityTaskManagerInternal getAtmInternal() {
+        return mInternal;
+    }
+
     public void initialize(IntentFirewall intentFirewall, PendingIntentController intentController,
             Looper looper) {
         mH = new H(looper);