diff --git a/test/fiber/lib/dune b/test/fiber/lib/dune
index a87f439c..d387491f 100644
--- a/test/fiber/lib/dune
+++ b/test/fiber/lib/dune
@@ -1,6 +1,5 @@
 (library
  (name t_fibers)
- (enabled_if
-  (>= %{ocaml_version} 5.0))
  (package moonpool)
+ (optional)
  (libraries moonpool moonpool.fib trace qcheck-core))