From b7ed64918519de9229213e19fcf771d5ceaa932a Mon Sep 17 00:00:00 2001
From: Tobias Lindahl <tobias@happihacking.com>
Date: Mon, 1 Nov 2021 14:56:10 +0100
Subject: [PATCH] test(persistent_session): wait in test to avoid race

---
 apps/emqx/test/emqx_persistent_session_SUITE.erl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/apps/emqx/test/emqx_persistent_session_SUITE.erl b/apps/emqx/test/emqx_persistent_session_SUITE.erl
index fbf1696f0..d5637cad2 100644
--- a/apps/emqx/test/emqx_persistent_session_SUITE.erl
+++ b/apps/emqx/test/emqx_persistent_session_SUITE.erl
@@ -378,6 +378,8 @@ t_cancel_on_disconnect(Config) ->
     {ok, _} = emqtt:ConnFun(Client1),
     ok = emqtt:disconnect(Client1, 0, #{'Session-Expiry-Interval' => 0}),
 
+    wait_for_cm_unregister(ClientId),
+
     {ok, Client2} = emqtt:start_link([ {clientid, ClientId},
                                        {proto_ver, v5},
                                        {clean_start, false},