diff --git a/test/lwt/fibers/t_fib1.ml b/test/lwt/fibers/t_fib1.ml
index cd96440d..175e5983 100644
--- a/test/lwt/fibers/t_fib1.ml
+++ b/test/lwt/fibers/t_fib1.ml
@@ -1,4 +1,3 @@
-open! Moonpool
 module M_lwt = Moonpool_lwt
 
 let ( let@ ) = ( @@ )