diff --git a/apex/sdkextensions/framework/java/android/os/ext/test/Test.java b/apex/sdkextensions/framework/java/android/os/ext/test/Test.java
new file mode 100644
index 0000000000000..1715f498be1ef
--- /dev/null
+++ b/apex/sdkextensions/framework/java/android/os/ext/test/Test.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.os.ext.test;
+
+import android.annotation.SystemApi;
+
+/**
+ * This class exists temporarily to verify SDK updates are working properly.
+ * @deprecated Do not use.
+ */
+@Deprecated
+public class Test {
+
+    public Test() { }
+
+    /** @hide */
+    public void testA() {}
+
+    /** @hide */
+    public void testB() {}
+
+    /** @hide */
+    public void testC() {}
+
+    /** @hide */
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    public void testD() {}
+
+    public void testE() {}
+
+    /** @hide */
+    @SystemApi
+    public void testF() {}
+
+    /** @hide */
+    @SystemApi
+    public void testG() {}
+
+}
diff --git a/api/current.txt b/api/current.txt
index a53d444dec417..e3b557d8387cb 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -37046,6 +37046,15 @@ package android.os {
 
 }
 
+package android.os.ext.test {
+
+  @Deprecated public class Test {
+    ctor @Deprecated public Test();
+    method @Deprecated public void testE();
+  }
+
+}
+
 package android.os.health {
 
   public class HealthStats {
diff --git a/api/module-lib-current.txt b/api/module-lib-current.txt
index 8100b07c31e36..59aa145ce1e9b 100644
--- a/api/module-lib-current.txt
+++ b/api/module-lib-current.txt
@@ -120,6 +120,14 @@ package android.net {
 
 }
 
+package android.os.ext.test {
+
+  @Deprecated public class Test {
+    method @Deprecated public void testD();
+  }
+
+}
+
 package android.util {
 
   public final class Log {
diff --git a/api/system-current.txt b/api/system-current.txt
index 17eac7902d157..eaa7112d278ea 100755
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -9146,6 +9146,15 @@ package android.os.ext {
 
 }
 
+package android.os.ext.test {
+
+  @Deprecated public class Test {
+    method @Deprecated public void testF();
+    method @Deprecated public void testG();
+  }
+
+}
+
 package android.os.image {
 
   public class DynamicSystemClient {