diff --git a/etc/xo/subsystem-list b/etc/xo/subsystem-list
index 409b7ea4..12872e86 100644
--- a/etc/xo/subsystem-list
+++ b/etc/xo/subsystem-list
@@ -9,13 +9,15 @@ xo-facet
 xo-printable2
 xo-testutil
 xo-alloc2
+xo-refcnt
+xo-reflect
+xo-stringtable2
+xo-object2
 xo-gc
 xo-alloc
 xo-object
-xo-refcnt
 xo-ordinaltree
 xo-pyutil
-xo-reflect
 xo-pyreflect
 xo-ratio
 xo-unit