diff --git a/test/emqx_channel_SUITE.erl b/test/emqx_channel_SUITE.erl
index 7887eeca3..2c8bece49 100644
--- a/test/emqx_channel_SUITE.erl
+++ b/test/emqx_channel_SUITE.erl
@@ -495,9 +495,6 @@ t_enrich_client(_) ->
 t_check_banned(_) ->
     ok = emqx_channel:check_banned(connpkt(), channel()).
 
-t_check_flapping(_) ->
-    ok = emqx_channel:check_flapping(connpkt(), channel()).
-
 t_auth_connect(_) ->
     {ok, _Chan} = emqx_channel:auth_connect(connpkt(), channel()).
 
diff --git a/test/emqx_sys_mon_SUITE.erl b/test/emqx_sys_mon_SUITE.erl
index ca02305b9..d7a616ad6 100644
--- a/test/emqx_sys_mon_SUITE.erl
+++ b/test/emqx_sys_mon_SUITE.erl
@@ -80,9 +80,9 @@ end_per_testcase(_, _Config) ->
 
 t_procinfo(_) ->
     ok = meck:new(emqx_vm, [passthrough, no_history]),
-    ok = meck:expect(emqx_vm, get_process_info, fun(_) -> undefined end),
-    ok = meck:expect(emqx_vm, get_process_gc, fun(_) -> ok end),
-    ?assertEqual(undefined, emqx_sys_mon:procinfo([])),
+    ok = meck:expect(emqx_vm, get_process_info, fun(_) -> [] end),
+    ok = meck:expect(emqx_vm, get_process_gc_info, fun(_) -> [] end),
+    ?assertEqual([], emqx_sys_mon:procinfo([])),
     ok = meck:expect(emqx_vm, get_process_info, fun(_) -> ok end),
     ok = meck:expect(emqx_vm, get_process_gc, fun(_) -> undefined end),
     ?assertEqual(undefined, emqx_sys_mon:procinfo([])),