import com.eviware.soapui.SoapUI

import com.eviware.soapui.settings.HttpSettings

import com.eviware.soapui.model.testsuite.TestStepResult.TestStepStatus

// get the settings

def settings = SoapUI.getSettings();

// save the possible previous timeout

def bk_timeout = settings.getString(HttpSettings.SOCKET_TIMEOUT,"");

// set the new timeout... in your case 5 minutes in miliseconds

settings.setString(HttpSettings.SOCKET_TIMEOUT,"300000");

// save the new settings

SoapUI.saveSettings();

// get the testStep by name

def testStep = testRunner.testCase.getTestStepByName('Test Request')

// run it

def result = testStep.run( testRunner, context )

if( result.status == TestStepStatus.OK )

{

    // ... if all ok

}