The PayloadRegistry#registerResponsePayload() is being called after the #retrieveResponsePayload() which ends up with ResponsePayloadWasNeverRegistered exception. ------------------------------------------------------------------------------------------------------------------------------------------------------------------ Key: ARQ-1420 URL: https://issues.jboss.org/browse/ARQ-1420 Project: Arquillian Issue Type: Feature Request Security Level: Public(Everyone can see) Components: Extension - Warp Affects Versions: warp_1.0.0.Alpha3 Reporter: Jakub Narloch Assignee: Lukáš Fryč I'm facing some problem in the JAX-RS extension for the CXF. I'm already know that the CXF filter is doing a explicit OutputStream.flush() on the response, but not sure whether this affects anything. Although, it is worth to mention that I'm not facing any problems with other implementations. Currently I was able to debug only that the #retrieveResponsePayload() is being called before the payload registration, which cause an exception to be raised.