Warp JSF: Nonexistent facelet file causes IllegalArgumentException

Simple testcase: @RunWith(Arquillian.class) @WarpTest @RunAsClient public class WarpDroneTest { @ArquillianResource private URL contextPath; @Drone private transient WebDriver browser; @Deployment public static WebArchive createDeployment() { return ShrinkWrap.create(WebArchive.class) .addAsWebInfResource(EmptyAsset.INSTANCE, "faces-config.xml" ); } @Test public void testNotFoundFaces2() { Warp.initiate( new Activity() { @Override public void perform() { browser.navigate().to(contextPath + "faces/notFound.xhtml" ); } }).inspect( new Inspection() { private static final long serialVersionUID = 1L; }); } } which throws: java.lang.IllegalArgumentException: Instance must be specified at org.jboss.arquillian.core.spi.Validate.notNull(Validate.java:44) at org.jboss.arquillian.core.impl.ManagerImpl.bind(ManagerImpl.java:164) at org.jboss.arquillian.core.impl.ManagerImpl.bindAndFire(ManagerImpl.java:235) at org.jboss.arquillian.core.impl.InstanceImpl.set(InstanceImpl.java:74) at org.jboss.arquillian.warp.jsf.JSFInstanceProducers.observesRestoreView(JSFInstanceProducers.java:124) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94) at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:88) at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:135) at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:115) at org.jboss.arquillian.core.impl.EventImpl.fire(EventImpl.java:67) at org.jboss.arquillian.warp.impl.server.lifecycle.LifecycleManagerImpl.fireEvent(LifecycleManagerImpl.java:41) at org.jboss.arquillian.warp.jsf.WarpPhaseListener.executeEvents(WarpPhaseListener.java:68) at org.jboss.arquillian.warp.jsf.WarpPhaseListener.afterPhase(WarpPhaseListener.java:48) at com.sun.faces.lifecycle.Phase.handleAfterPhase(Phase.java:189) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:107) at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:116) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) at org.jboss.arquillian.warp.impl.server.execution.WarpLifecycle.execute(WarpLifecycle.java:77) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94) at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99) at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81) at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:135) at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:115) at org.jboss.arquillian.core.impl.EventImpl.fire(EventImpl.java:67) at org.jboss.arquillian.warp.impl.server.execution.WarpRequestProcessor.processWarpRequest(WarpRequestProcessor.java:63) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94) at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99) at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81) at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:135) at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:115) at org.jboss.arquillian.core.impl.EventImpl.fire(EventImpl.java:67) at org.jboss.arquillian.warp.impl.server.execution.HttpRequestProcessor.processHttpRequest(HttpRequestProcessor.java:70) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.jboss.arquillian.core.impl.ObserverImpl.invoke(ObserverImpl.java:94) at org.jboss.arquillian.core.impl.EventContextImpl.invokeObservers(EventContextImpl.java:99) at org.jboss.arquillian.core.impl.EventContextImpl.proceed(EventContextImpl.java:81) at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:135) at org.jboss.arquillian.core.impl.ManagerImpl.fire(ManagerImpl.java:115) at org.jboss.arquillian.warp.impl.server.execution.WarpFilter.doFilterWarp(WarpFilter.java:144) at org.jboss.arquillian.warp.impl.server.execution.WarpFilter.doFilterHttp(WarpFilter.java:117) at org.jboss.arquillian.warp.impl.server.execution.WarpFilter.doFilter(WarpFilter.java:90) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) at com.sun.grizzly.ContextTask.run(ContextTask.java:71) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) at java.lang.Thread.run(Thread.java:724)