diff --git a/spec/library/set/shared/inspect.rb b/spec/library/set/shared/inspect.rb
index 1c4d977c2..1999b7b55 100644
--- a/spec/library/set/shared/inspect.rb
+++ b/spec/library/set/shared/inspect.rb
@@ -16,10 +16,7 @@
   end
 
   it "correctly handles self-references" do
-    # NATFIXME: Support this syntax
-    # (set = Set[]) << set
-    set = Set[]
-    set << set
+    (set = Set[]) << set
     set.send(@method).should be_kind_of(String)
     set.send(@method).should include("#<Set: {...}>")
   end