diff --git a/test/fiber/dune b/test/fiber/dune
index 5786dfff..42845ff5 100644
--- a/test/fiber/dune
+++ b/test/fiber/dune
@@ -1,8 +1,5 @@
 (tests
- (names
-  t_fls
-  t_main ; t_fib1
-  )
+ (names t_fls t_main t_fib1)
  (enabled_if
   (>= %{ocaml_version} 5.0))
  (package moonpool)
diff --git a/test/fiber/t_fib1.ml b/test/fiber/t_fib1.ml
index 1f4207b4..7ceedbf4 100644
--- a/test/fiber/t_fib1.ml
+++ b/test/fiber/t_fib1.ml
@@ -3,7 +3,7 @@ module A = Atomic
 module F = Moonpool_fib.Fiber
 
 let ( let@ ) = ( @@ )
-let runner = Ws_pool.create ~num_threads:8 ()
+let runner = Fifo_pool.create ~num_threads:1 ()
 
 module TS = struct
   type t = int list