diff --git a/test/acl_test.exs b/test/acl_test.exs
index c5482727f..4bd8e6989 100644
--- a/test/acl_test.exs
+++ b/test/acl_test.exs
@@ -26,7 +26,7 @@ defmodule ACLTest do
   setup_all do
     :ok = :mnesia.start
     :ok = :jid.start
-    :ok = :stringprep.start
+    :stringprep.start
     :ok = :ejabberd_config.start(["domain1", "domain2"], [])
     :ok = :acl.start
   end