I'm in SoapUI NG how to set HTTP Headers for all requests inside Test Suite?

Hi,

Yes you can do that in the RequestFilter.filterRequest event handler,

http://www.soapui.org/scripting---properties/custom-event-handlers.html

import com.eviware.soapui.support.types.StringToStringMap

def headers = new StringToStringMap()

headers.put("HeaderName", "HeaderValue")
request.setRequestHeaders(headers)

Thanks,
Jeshtha