diff --git a/tests/helper/Android.bp b/tests/helper/Android.bp
index f36a15d..6f07efd 100644
--- a/tests/helper/Android.bp
+++ b/tests/helper/Android.bp
@@ -21,3 +21,15 @@
     ],
     sdk_version: "test_current",
 }
+
+java_test_helper_library {
+    name: "MicrodroidTestPreparer",
+    srcs: ["src/java/com/android/microdroid/test/preparer/*.java"],
+    libs: ["tradefed"],
+    test_suites: [
+        "cts",
+        "general-tests",
+    ],
+    host_supported: true,
+    device_supported: false,
+}