diff --git a/vdso/BUILD b/vdso/BUILD
index bc6aaf878..a8fcbf135 100644
--- a/vdso/BUILD
+++ b/vdso/BUILD
@@ -3,6 +3,7 @@
 #   normal system VDSO (time, gettimeofday, clock_gettimeofday) but which uses
 #   timekeeping parameters managed by the sandbox kernel.
 
+# Placeholder: load py_test
 load("//tools:arch.bzl", "select_arch")
 load("//tools:defs.bzl", "cc_flags_supplier", "cc_toolchain", "vdso_linker_option")