diff --git a/tests/emit1.ml b/tests/emit1.ml
index 52296b86..f9eaff21 100644
--- a/tests/emit1.ml
+++ b/tests/emit1.ml
@@ -44,6 +44,6 @@ let run () =
   done
 
 let () =
-  T.Globals.service_name := Some "t1";
+  T.Globals.service_name := "t1";
   T.Globals.service_namespace := Some "ocaml-otel.test";
   Opentelemetry_client_ocurl.with_setup run