diff --git a/spec/tags/ruby/core/process/groups_tags.txt b/spec/tags/ruby/core/process/groups_tags.txt
index 699f9567a06..91b3c93604c 100644
--- a/spec/tags/ruby/core/process/groups_tags.txt
+++ b/spec/tags/ruby/core/process/groups_tags.txt
@@ -1,2 +1,3 @@
 fails:Process.groups sets the list of gids of groups in the supplemental group access list
 fails:Process.groups= raises Errno::EPERM
+fails(missing one group on MacOS, unsure if it is important):Process.groups gets an Array of the gids of groups in the supplemental group access list