diff --git a/core/api/current.txt b/core/api/current.txt
index d6c783dc71b02..711afcc0b4007 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -30763,19 +30763,10 @@ package android.os {
   public abstract class CombinedVibrationEffect implements android.os.Parcelable {
     method @NonNull public static android.os.CombinedVibrationEffect createSynced(@NonNull android.os.VibrationEffect);
     method public int describeContents();
-    method @NonNull public static android.os.CombinedVibrationEffect.SequentialCombination startSequential();
     method @NonNull public static android.os.CombinedVibrationEffect.SyncedCombination startSynced();
     field @NonNull public static final android.os.Parcelable.Creator<android.os.CombinedVibrationEffect> CREATOR;
   }
 
-  public static final class CombinedVibrationEffect.SequentialCombination {
-    method @NonNull public android.os.CombinedVibrationEffect.SequentialCombination addNext(int, @NonNull android.os.VibrationEffect);
-    method @NonNull public android.os.CombinedVibrationEffect.SequentialCombination addNext(int, @NonNull android.os.VibrationEffect, int);
-    method @NonNull public android.os.CombinedVibrationEffect.SequentialCombination addNext(@NonNull android.os.CombinedVibrationEffect);
-    method @NonNull public android.os.CombinedVibrationEffect.SequentialCombination addNext(@NonNull android.os.CombinedVibrationEffect, int);
-    method @NonNull public android.os.CombinedVibrationEffect combine();
-  }
-
   public static final class CombinedVibrationEffect.SyncedCombination {
     method @NonNull public android.os.CombinedVibrationEffect.SyncedCombination addVibrator(int, @NonNull android.os.VibrationEffect);
     method @NonNull public android.os.CombinedVibrationEffect combine();
diff --git a/core/api/test-current.txt b/core/api/test-current.txt
index e0e84537368f0..a860a7773691c 100644
--- a/core/api/test-current.txt
+++ b/core/api/test-current.txt
@@ -1371,6 +1371,7 @@ package android.os {
 
   public abstract class CombinedVibrationEffect implements android.os.Parcelable {
     method public abstract long getDuration();
+    method @NonNull public static android.os.CombinedVibrationEffect.SequentialCombination startSequential();
   }
 
   public static final class CombinedVibrationEffect.Mono extends android.os.CombinedVibrationEffect {
@@ -1388,6 +1389,14 @@ package android.os {
     field @NonNull public static final android.os.Parcelable.Creator<android.os.CombinedVibrationEffect.Sequential> CREATOR;
   }
 
+  public static final class CombinedVibrationEffect.SequentialCombination {
+    method @NonNull public android.os.CombinedVibrationEffect.SequentialCombination addNext(int, @NonNull android.os.VibrationEffect);
+    method @NonNull public android.os.CombinedVibrationEffect.SequentialCombination addNext(int, @NonNull android.os.VibrationEffect, int);
+    method @NonNull public android.os.CombinedVibrationEffect.SequentialCombination addNext(@NonNull android.os.CombinedVibrationEffect);
+    method @NonNull public android.os.CombinedVibrationEffect.SequentialCombination addNext(@NonNull android.os.CombinedVibrationEffect, int);
+    method @NonNull public android.os.CombinedVibrationEffect combine();
+  }
+
   public static final class CombinedVibrationEffect.Stereo extends android.os.CombinedVibrationEffect {
     method public long getDuration();
     method @NonNull public android.util.SparseArray<android.os.VibrationEffect> getEffects();
diff --git a/core/java/android/os/CombinedVibrationEffect.java b/core/java/android/os/CombinedVibrationEffect.java
index c8e682c86ea7e..e068772e954a8 100644
--- a/core/java/android/os/CombinedVibrationEffect.java
+++ b/core/java/android/os/CombinedVibrationEffect.java
@@ -76,7 +76,9 @@ public abstract class CombinedVibrationEffect implements Parcelable {
      * A sequential vibration effect should be performed by multiple vibrators in order.
      *
      * @see CombinedVibrationEffect.SequentialCombination
+     * @hide
      */
+    @TestApi
     @NonNull
     public static SequentialCombination startSequential() {
         return new SequentialCombination();
@@ -162,7 +164,9 @@ public abstract class CombinedVibrationEffect implements Parcelable {
      * A combination of haptic effects that should be played in multiple vibrators in sequence.
      *
      * @see CombinedVibrationEffect#startSequential()
+     * @hide
      */
+    @TestApi
     public static final class SequentialCombination {
 
         private final ArrayList<CombinedVibrationEffect> mEffects = new ArrayList<>();