diff --git a/tests/aidl/Android.bp b/tests/aidl/Android.bp
new file mode 100644
index 0000000..893ec0b
--- /dev/null
+++ b/tests/aidl/Android.bp
@@ -0,0 +1,18 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+aidl_interface {
+    name: "com.android.microdroid.testservice",
+    srcs: ["com/android/microdroid/testservice/**/*.aidl"],
+    unstable: true,
+    backend: {
+        java: {
+            platform_apis: true,
+            gen_rpc: true,
+        },
+        cpp: {
+            enabled: true,
+        },
+    },
+}
diff --git a/tests/aidl/com/android/microdroid/testservice/ITestService.aidl b/tests/aidl/com/android/microdroid/testservice/ITestService.aidl
new file mode 100644
index 0000000..cdcb2bd
--- /dev/null
+++ b/tests/aidl/com/android/microdroid/testservice/ITestService.aidl
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2021 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 com.android.microdroid.testservice;
+
+/** {@hide} */
+interface ITestService {
+    const int SERVICE_PORT = 5678;
+
+    /* add two integers. */
+    int addInteger(int a, int b);
+}