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-rw-r--r--erts/emulator/test/busy_port_SUITE.erl2
1 files changed, 2 insertions, 0 deletions
diff --git a/erts/emulator/test/busy_port_SUITE.erl b/erts/emulator/test/busy_port_SUITE.erl
index 2c63296b83..4b4af0babe 100644
--- a/erts/emulator/test/busy_port_SUITE.erl
+++ b/erts/emulator/test/busy_port_SUITE.erl
@@ -170,6 +170,7 @@ send_3(Config) when is_list(Config) ->
?line {Owner,Slave} = get_slave(),
?line ok = erlang:send(Slave, {Owner,{command,"set busy"}},
[nosuspend]),
+ receive after 100 -> ok end, % ensure command reached port
?line nosuspend = erlang:send(Slave, {Owner,{command,"busy"}},
[nosuspend]),
?line unlock_slave(),
@@ -563,6 +564,7 @@ scheduling_delay_busy_nosuspend(Config) ->
{2,{call,[{var,1},open_port]}},
{0,{cast,[{var,1},{command,1,100}]}},
{0,{cast,[{var,1},{busy,2}]}},
+ {0,{timer,sleep,[200]}}, % ensure reached port
{10,{call,[{var,1},{command,3,[nosuspend]}]}},
{0,{timer,sleep,[200]}},
{0,{erlang,port_command,[{var,2},<<$N>>,[force]]}},