diff --git a/src/client-cohttp-lwt/opentelemetry_client_cohttp_lwt.ml b/src/client-cohttp-lwt/opentelemetry_client_cohttp_lwt.ml
index 48ad9c8..cffe8a7 100644
--- a/src/client-cohttp-lwt/opentelemetry_client_cohttp_lwt.ml
+++ b/src/client-cohttp-lwt/opentelemetry_client_cohttp_lwt.ml
@@ -569,11 +569,7 @@ let setup_ ?stop ?config () =
   let backend = create_backend ?stop ?config () in
   let (module B : OT.Collector.BACKEND) = backend in
   OT.Collector.set_backend backend;
-  let cleanup () =
-    B.tick ();
-    B.cleanup ()
-  in
-  cleanup
+  OT.Collector.remove_backend
 
 let setup ?stop ?config ?(enable = true) () =
   if enable then (
diff --git a/src/client-ocurl/opentelemetry_client_ocurl.ml b/src/client-ocurl/opentelemetry_client_ocurl.ml
index 8d3ea11..b5412f2 100644
--- a/src/client-ocurl/opentelemetry_client_ocurl.ml
+++ b/src/client-ocurl/opentelemetry_client_ocurl.ml
@@ -508,12 +508,7 @@ let setup_ ?(stop = Atomic.make false) ?(config : Config.t = Config.make ()) ()
     let sleep_ms = min 60_000 (max 2 config.ticker_interval_ms) in
     ignore (setup_ticker_thread ~stop ~sleep_ms backend () : Thread.t)
   );
-
-  let cleanup () =
-    B.tick ();
-    B.cleanup ()
-  in
-  cleanup
+  OT.Collector.remove_backend
 
 let setup ?stop ?config ?(enable = true) () =
   if enable then (