diff --git a/test/afilter-test.rkt b/test/afilter-test.rkt
index 156aac7..baa066f 100644
--- a/test/afilter-test.rkt
+++ b/test/afilter-test.rkt
@@ -16,7 +16,7 @@
  "Multiple 'it' in a nested expression.")
 
 (define (f lst)
-  (afilter (= it 42) lst))
+  (afilter (/ it 0) lst))
 
 (check-equal?
  '()