diff --git a/root.bp b/root.bp
index d82e09d22..923e886bd 100644
--- a/root.bp
+++ b/root.bp
@@ -32,4 +32,5 @@ optional_subdirs = [
     "system/media/*",
     "system/security/*",
     "system/tools/*",
+    "test/vts",
 ]