diff --git a/syndicate/test/core/correct-retraction-on-exn.rkt b/syndicate/test/core/correct-retraction-on-exn.rkt
index ddb3841..43ef368 100644
--- a/syndicate/test/core/correct-retraction-on-exn.rkt
+++ b/syndicate/test/core/correct-retraction-on-exn.rkt
@@ -39,6 +39,6 @@
      (spawn (on (retracted (layer $x)) (printf "~a gone\n" x)))]
   (it "should crash deliberately" (actor-died? 'crasher "Deliberate error"))
   ;; a permutation of these lines is acceptable:
-  (expected-output "middle gone"
-                   "inner gone"
-                   "outer gone"))
+  (expected-output-set "middle gone"
+                       "inner gone"
+                       "outer gone"))