diff --git a/core/api/test-current.txt b/core/api/test-current.txt
index 9eb9d66cb71ae..9bd29700a12d8 100644
--- a/core/api/test-current.txt
+++ b/core/api/test-current.txt
@@ -3568,6 +3568,8 @@ package android.view {
     field public static final int ACCESSIBILITY_TITLE_CHANGED = 33554432; // 0x2000000
     field public static final int FLAG_SLIPPERY = 536870912; // 0x20000000
     field public CharSequence accessibilityTitle;
+    field public float preferredMaxDisplayRefreshRate;
+    field public float preferredMinDisplayRefreshRate;
     field public int privateFlags;
   }
 
diff --git a/core/java/android/view/WindowManager.java b/core/java/android/view/WindowManager.java
index e40f8e78dafcf..6714c393d64bb 100644
--- a/core/java/android/view/WindowManager.java
+++ b/core/java/android/view/WindowManager.java
@@ -3763,6 +3763,7 @@ public interface WindowManager extends ViewManager {
          * This value is ignored if {@link #preferredDisplayModeId} is set.
          * @hide
          */
+        @TestApi
         public float preferredMinDisplayRefreshRate;
 
         /**
@@ -3771,6 +3772,7 @@ public interface WindowManager extends ViewManager {
          * This value is ignored if {@link #preferredDisplayModeId} is set.
          * @hide
          */
+        @TestApi
         public float preferredMaxDisplayRefreshRate;
 
         /** Indicates whether this window wants the HDR conversion is disabled. */