setFormatter(new \Monolog\Formatter\ChromePHPFormatter()); $socket = $this->getMock('\Monolog\Handler\SyslogUdp\UdpSocket', ['write'], ['lol', 'lol']); $socket->expects($this->at(0)) ->method('write') ->with("lol", "<172>: "); $socket->expects($this->at(1)) ->method('write') ->with("hej", "<172>: "); $handler->setSocket($socket); $handler->handle($this->getRecordWithMessage("hej\nlol")); } protected function getRecordWithMessage($msg) { return ['message' => $msg, 'level' => \Monolog\Logger::WARNING, 'context' => null, 'extra' => [], 'channel' => 'lol']; } }