diff --git a/test/effect-based/t_fork_join.ml b/test/effect-based/t_fork_join.ml
index e9110f72..7fc8fa31 100644
--- a/test/effect-based/t_fork_join.ml
+++ b/test/effect-based/t_fork_join.ml
@@ -326,15 +326,15 @@ let t_map ~chunk_size () =
 let () =
   QCheck_base_runner.run_tests_main
     [
-      (* t_eval; *)
-      (* t_map ~chunk_size:1 (); *)
-      (* t_map ~chunk_size:50 (); *)
-      (* t_for_nested ~min:1 ~chunk_size:1 (); *)
-      (* t_for_nested ~min:4 ~chunk_size:1 (); *)
-      (* t_for_nested ~min:1 ~chunk_size:3 (); *)
-      (* t_for_nested ~min:4 ~chunk_size:3 (); *)
+      t_eval;
+      t_map ~chunk_size:1 ();
+      t_map ~chunk_size:50 ();
+      t_for_nested ~min:1 ~chunk_size:1 ();
+      t_for_nested ~min:4 ~chunk_size:1 ();
+      t_for_nested ~min:1 ~chunk_size:3 ();
+      t_for_nested ~min:4 ~chunk_size:3 ();
       t_for_nested ~min:1 ~chunk_size:100 ();
-      (* t_for_nested ~min:4 ~chunk_size:100 (); *)
+      t_for_nested ~min:4 ~chunk_size:100 ();
     ]
 
 [@@@endif]