Codeception/Codeception — pull request #54 by lostintime (2012-08-25 13:46:27+00:00)
Title: unable to send more than 1 parameters using SOAP.sendSoapRequest

method sendSoapRequest is appending to call only one top level node:

$I->sendSoapRequest('signIn', Soap::request()
->login->val('username')->parent()
->password->val('password')
);

is generating request containing only login parameter.