diff --git a/api/test-current.txt b/api/test-current.txt
index 730a2a27df6ed..6353edc51a6f3 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -83,6 +83,7 @@ package android.app {
     method public static void resumeAppSwitches() throws android.os.RemoteException;
     method @RequiresPermission(android.Manifest.permission.CHANGE_CONFIGURATION) public void scheduleApplicationInfoChanged(java.util.List<java.lang.String>, int);
     method @RequiresPermission("android.permission.MANAGE_USERS") public boolean switchUser(@NonNull android.os.UserHandle);
+    method @RequiresPermission(android.Manifest.permission.CHANGE_CONFIGURATION) public boolean updateMccMncConfiguration(@NonNull String, @NonNull String);
     field public static final int PROCESS_CAPABILITY_ALL = 7; // 0x7
     field public static final int PROCESS_CAPABILITY_ALL_EXPLICIT = 1; // 0x1
     field public static final int PROCESS_CAPABILITY_ALL_IMPLICIT = 6; // 0x6
diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index dd4788e1146a9..1a92b758ab9f5 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -4243,6 +4243,7 @@ public class ActivityManager {
      * @hide
      */
     @SystemApi
+    @TestApi
     @RequiresPermission(android.Manifest.permission.CHANGE_CONFIGURATION)
     public boolean updateMccMncConfiguration(@NonNull String mcc, @NonNull String mnc) {
         if (mcc == null || mnc == null) {