diff --git a/S12-subset/subtypes.t b/S12-subset/subtypes.t
index 16e7588647..8d8f1278fc 100644
--- a/S12-subset/subtypes.t
+++ b/S12-subset/subtypes.t
@@ -171,6 +171,7 @@ Tests subtypes, specifically in the context of multimethod dispatch.
     subset SR1 of R1 where 1;
     ok !(1 ~~ SR1), 'subtypes based on roles work';
     my $x = 1 but R1;
+    #?rakudo.jvm todo 'mixin of role does not work correctly'
     ok $x ~~ SR1,   'subtypes based on roles work';
 }