Test::TCP 2.00 drops wait_port_sleep and wait_port_retry argument added at 1.28, and adds max_wait option. Test::TCP waits up to max_wait seconds while stretching the sleep time gradually from 0.001 seconds https://metacpan.org/release/Test-TCP Test::TCP 1.28 で追加された wait_port_sleep と wait_port_retry がなくなって、新たに max_wait が追加されました。 use Test::TCP; test_tcp( server => sub { .. }, client => sub { .. },

