Skipped: -> Cannot run test without a TLS enabled SMTP host to connect to (define SWIFT_TLS_HOST in tests/acceptance.conf.php if you wish to run this test) at [/var/www/proyectos.knet.es/aplicacion_flex/lib/Swift-5.0.1/tests/acceptance/Swift/Transport/StreamBuffer/TlsSocketAcceptanceTest.php line 17]