diff --git a/app/actions/connect.js b/app/actions/connect.js
deleted file mode 100644
index 57f46c71b..000000000
--- a/app/actions/connect.js
+++ /dev/null
@@ -1,20 +0,0 @@
-import * as types from './actionsTypes';
-
-export function connectRequest() {
-	return {
-		type: types.METEOR.REQUEST
-	};
-}
-
-export function connectSuccess() {
-	return {
-		type: types.METEOR.SUCCESS
-	};
-}
-
-export function disconnect(err) {
-	return {
-		type: types.METEOR.DISCONNECT,
-		err
-	};
-}
diff --git a/app/actions/connect.ts b/app/actions/connect.ts
new file mode 100644
index 000000000..be566253b
--- /dev/null
+++ b/app/actions/connect.ts
@@ -0,0 +1,21 @@
+import { Action } from 'redux';
+
+import * as types from './actionsTypes';
+
+export function connectRequest(): Action {
+	return {
+		type: types.METEOR.REQUEST
+	};
+}
+
+export function connectSuccess(): Action {
+	return {
+		type: types.METEOR.SUCCESS
+	};
+}
+
+export function disconnect(): Action {
+	return {
+		type: types.METEOR.DISCONNECT
+	};
+}
diff --git a/app/definitions/redux/index.ts b/app/definitions/redux/index.ts
index 59eb7c921..212e304bb 100644
--- a/app/definitions/redux/index.ts
+++ b/app/definitions/redux/index.ts
@@ -5,11 +5,12 @@ import { TActionApp } from '../../actions/app';
 import { IActiveUsers } from '../../reducers/activeUsers';
 import { ISelectedUsers } from '../../reducers/selectedUsers';
 import { IApp } from '../../reducers/app';
+import { IConnect } from '../../reducers/connect';
 
 export interface IApplicationState {
 	settings: any;
 	login: any;
-	meteor: any;
+	meteor: IConnect;
 	server: any;
 	selectedUsers: ISelectedUsers;
 	createChannel: any;
diff --git a/app/reducers/connect.test.ts b/app/reducers/connect.test.ts
new file mode 100644
index 000000000..349305af8
--- /dev/null
+++ b/app/reducers/connect.test.ts
@@ -0,0 +1,44 @@
+import { appStart, appInit, setMasterDetail } from '../actions/app';
+import { initialState } from './connect';
+import { mockedStore } from './mockedStore';
+import { RootEnum } from '../definitions';
+import { APP_STATE } from '../actions/actionsTypes';
+
+describe('test reducer', () => {
+	it('should return initial state', () => {
+		const { meteor } = mockedStore.getState();
+		expect(meteor).toEqual(initialState);
+	});
+
+	it('should return root state after dispatch appStart action', () => {
+		mockedStore.dispatch(appStart({ root: RootEnum.ROOT_INSIDE }));
+		const { root } = mockedStore.getState().app;
+		expect(root).toEqual(RootEnum.ROOT_INSIDE);
+	});
+
+	it('should return ready state after dispatch appInit action', () => {
+		mockedStore.dispatch(appInit());
+		const { ready } = mockedStore.getState().app;
+		expect(ready).toEqual(false);
+	});
+
+	it('should return ready state after dispatch setMasterDetail action', () => {
+		mockedStore.dispatch(setMasterDetail(false));
+		const { isMasterDetail } = mockedStore.getState().app;
+		expect(isMasterDetail).toEqual(false);
+	});
+
+	it('should return correct state after app go to foreground', () => {
+		mockedStore.dispatch({ type: APP_STATE.FOREGROUND });
+		const { foreground, background } = mockedStore.getState().app;
+		expect(foreground).toEqual(true);
+		expect(background).toEqual(false);
+	});
+
+	it('should return correct state after app go to background', () => {
+		mockedStore.dispatch({ type: APP_STATE.BACKGROUND });
+		const { foreground, background } = mockedStore.getState().app;
+		expect(foreground).toEqual(false);
+		expect(background).toEqual(true);
+	});
+});
diff --git a/app/reducers/connect.js b/app/reducers/connect.ts
similarity index 63%
rename from app/reducers/connect.js
rename to app/reducers/connect.ts
index a8ef2bea1..beffc58bd 100644
--- a/app/reducers/connect.js
+++ b/app/reducers/connect.ts
@@ -1,11 +1,18 @@
+import { Action } from 'redux';
+
 import { METEOR } from '../actions/actionsTypes';
 
-const initialState = {
+export interface IConnect {
+	connecting: boolean;
+	connected: boolean;
+}
+
+export const initialState: IConnect = {
 	connecting: false,
 	connected: false
 };
 
-export default function connect(state = initialState, action) {
+export default function connect(state = initialState, action: Action): IConnect {
 	switch (action.type) {
 		case METEOR.REQUEST:
 			return {