diff --git a/basis/stack-checker/stack-checker-tests.factor b/basis/stack-checker/stack-checker-tests.factor
index 974b322d1f..4f2aedf899 100644
--- a/basis/stack-checker/stack-checker-tests.factor
+++ b/basis/stack-checker/stack-checker-tests.factor
@@ -450,7 +450,13 @@ DEFER: eee'
 [ [ [ append ] strict-each ] infer ] [ unbalanced-branches-error? ] must-fail-with
 [ [ [ 1 + ] strict-2map ] infer ] [ unbalanced-branches-error? ] must-fail-with
 
-! TODO: ensure that polymorphic checking works on recursive combinators
+! ensure that polymorphic checking works on recursive combinators
+: recursive-reduce ( identity i seq quot: ( prev elt -- next ) -- x )
+    2over bounds-check? [
+        [ [ nth-unsafe ] dip call ] 3keep [ 1 + ] 2dip recursive-reduce
+    ] [ 3drop ] if ; inline recursive
+{ 24995000 } [ 0 0 10000 iota [ dup even? [ + ] [ drop ] if ] recursive-reduce ] unit-test
+{ 4 1 } [ [ member? [ 1 + ] when ] curry recursive-reduce ] must-infer-as
 
 [ [ [ write write ] each      ] infer ] [ unbalanced-branches-error? ] must-fail-with