diff --git a/tests/poly-fail/dune b/tests/poly-fail/dune
index 7560f20..93a6de6 100755
--- a/tests/poly-fail/dune
+++ b/tests/poly-fail/dune
@@ -14,6 +14,6 @@
  (alias runtest)
  (package landmarks-ppx)
  (enabled_if
-  (>= %{ocaml_version} "4.08"))
+  (>= %{ocaml_version} "5"))
  (action
   (diff test.out.expected test.out)))