diff --git a/core/java/android/window/TaskOrganizer.java b/core/java/android/window/TaskOrganizer.java
index f29eb39045aed..cdb4762a4f0ae 100644
--- a/core/java/android/window/TaskOrganizer.java
+++ b/core/java/android/window/TaskOrganizer.java
@@ -21,6 +21,7 @@ import android.annotation.CallSuper;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.RequiresPermission;
+import android.annotation.SuppressLint;
 import android.annotation.TestApi;
 import android.app.ActivityManager;
 import android.os.IBinder;
@@ -151,6 +152,7 @@ public class TaskOrganizer extends WindowOrganizer {
     /** Gets direct child tasks (ordered from top-to-bottom) */
     @RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_TASKS)
     @Nullable
+    @SuppressLint("NullableCollection")
     public List<ActivityManager.RunningTaskInfo> getChildTasks(
             @NonNull WindowContainerToken parent, @NonNull int[] activityTypes) {
         try {
@@ -163,6 +165,7 @@ public class TaskOrganizer extends WindowOrganizer {
     /** Gets all root tasks on a display (ordered from top-to-bottom) */
     @RequiresPermission(android.Manifest.permission.MANAGE_ACTIVITY_TASKS)
     @Nullable
+    @SuppressLint("NullableCollection")
     public List<ActivityManager.RunningTaskInfo> getRootTasks(
             int displayId, @NonNull int[] activityTypes) {
         try {