diff --git a/js/testing/test-throughput-ws.html b/js/testing/test-throughput-ws.html
index 91dc359..14f9d39 100644
--- a/js/testing/test-throughput-ws.html
+++ b/js/testing/test-throughput-ws.html
@@ -42,6 +42,8 @@
 		    
 		    if (kind == Closure.UPCALL_CONTENT_BAD) {
 		    	console.log("NdnProtocol.ContentClosure: signature verification failed");
+		    	console.log(upcallInfo.contentObject.name.getName());
+		    	console.log(DataUtils.toHex(upcallInfo.contentObject.signature.Witness).toLowerCase());
 		    	return Closure.RESULT_OK;
 		    }