diff --git a/packages/app-testing/src/CallDisplay/index.js b/packages/app-testing/src/CallDisplay/index.js
index 0e70fe7ea3..a9c27a400b 100644
--- a/packages/app-testing/src/CallDisplay/index.js
+++ b/packages/app-testing/src/CallDisplay/index.js
@@ -12,7 +12,10 @@ import Button from 'semantic-ui-react/dist/es/elements/Button';
 import withObservable from '@polkadot/rx-react/with/observable';
 
 import StakingTransfer from '../StakingTransfer';
+import encode from '../encode';
+import addrSender from '../subject/addrSender';
 import extrinsicName from '../subject/extrinsicName';
+import nonceSender from '../subject/nonceSender';
 import ErrorComponent from './Error';
 
 type Props = BaseProps & {
@@ -30,7 +33,7 @@ function CallDisplay ({ className, style, value }: Props) {
 
   const Component = COMPONENTS[value] || ErrorComponent;
   const onSubmit = () => {
-    console.log('getValues', Component.getValues());
+    encode(addrSender.getValue(), nonceSender.getValue(), value, Component.getValues());
   };
 
   return (
diff --git a/packages/app-testing/src/StakingTransfer/getValues.js b/packages/app-testing/src/StakingTransfer/getValues.js
index 5c9a92a80e..573dfc0e4d 100644
--- a/packages/app-testing/src/StakingTransfer/getValues.js
+++ b/packages/app-testing/src/StakingTransfer/getValues.js
@@ -8,7 +8,7 @@ import addrRecipient from '../subject/addrRecipient';
 
 export default function getValues (): Array<mixed> {
   return [
-    addrRecipient.getValue(),
+    addrRecipient.getValue().publicKey(),
     amount.getValue()
   ];
 }
diff --git a/packages/app-testing/src/StakingTransfer/subject/amount.js b/packages/app-testing/src/StakingTransfer/subject/amount.js
index 1e5f08c17b..d6ea8d0fd7 100644
--- a/packages/app-testing/src/StakingTransfer/subject/amount.js
+++ b/packages/app-testing/src/StakingTransfer/subject/amount.js
@@ -3,8 +3,9 @@
 // of the ISC license. See the LICENSE file for details.
 // @flow
 
+import BN from 'bn.js';
 import { BehaviorSubject } from 'rxjs/BehaviorSubject';
 
-const subject = new BehaviorSubject();
+const subject = new BehaviorSubject(new BN(0));
 
 export default subject;
diff --git a/packages/app-testing/src/encode/index.js b/packages/app-testing/src/encode/index.js
index 8e1f635ad8..d2576c25e5 100644
--- a/packages/app-testing/src/encode/index.js
+++ b/packages/app-testing/src/encode/index.js
@@ -6,16 +6,16 @@
 // TODO: Move to API
 
 import type BN from 'bn.js';
-import type { Call } from '../calls/types';
 
 const bnToU8a = require('@polkadot/util/bn/toU8a');
 const u8aConcat = require('@polkadot/util/u8a/concat');
-const u8aToHex = require('@polkadot/util/u8a/toHex');
 
+const calls = require('../calls');
 const encodeParams = require('./params');
 
 // flowlint-next-line unclear-type:off
-module.exports = function encode (sender: KeyringPair, nonce: number | BN, { index, params }: Call, values: Array<mixed>) {
+module.exports = function encode (sender: KeyringPair, nonce: number | BN, method: string, values: Array<mixed>): Uint8Array {
+  const { index, params } = calls[method];
   const encodedParams = encodeParams(values, params);
   const message = u8aConcat(
     sender.publicKey(),
@@ -25,11 +25,5 @@ module.exports = function encode (sender: KeyringPair, nonce: number | BN, { ind
   );
   const signature = sender.sign(message);
 
-  console.log('message', u8aToHex(message));
-  console.log('signature', u8aToHex(signature));
-
-  return {
-    message,
-    signature
-  };
+  return u8aConcat(message, signature);
 };
diff --git a/packages/app-testing/src/subject/extrinsicName.js b/packages/app-testing/src/subject/extrinsicName.js
index 45630285c3..1e5f08c17b 100644
--- a/packages/app-testing/src/subject/extrinsicName.js
+++ b/packages/app-testing/src/subject/extrinsicName.js
@@ -3,8 +3,8 @@
 // of the ISC license. See the LICENSE file for details.
 // @flow
 
-import { ReplaySubject } from 'rxjs/ReplaySubject';
+import { BehaviorSubject } from 'rxjs/BehaviorSubject';
 
-const subject = new ReplaySubject(1);
+const subject = new BehaviorSubject();
 
 export default subject;
diff --git a/packages/app-testing/src/subject/nonceSender.js b/packages/app-testing/src/subject/nonceSender.js
index 8cbb250a87..d6ea8d0fd7 100644
--- a/packages/app-testing/src/subject/nonceSender.js
+++ b/packages/app-testing/src/subject/nonceSender.js
@@ -4,10 +4,8 @@
 // @flow
 
 import BN from 'bn.js';
-import { ReplaySubject } from 'rxjs/ReplaySubject';
+import { BehaviorSubject } from 'rxjs/BehaviorSubject';
 
-const subject = new ReplaySubject(1);
-
-subject.next(new BN(0));
+const subject = new BehaviorSubject(new BN(0));
 
 export default subject;