diff --git a/cypress/integration/backgroundApps.spec.ts b/cypress/integration/backgroundApps.spec.ts
new file mode 100644
index 0000000..32bf5bf
--- /dev/null
+++ b/cypress/integration/backgroundApps.spec.ts
@@ -0,0 +1,266 @@
+/* eslint-disable @typescript-eslint/camelcase */
+/// <reference types="cypress" />
+import { Server, WebSocket } from 'mock-socket';
+
+import { initProtocol, sendMessage } from '../support/helpers/socket.helpers';
+import { Message } from '../../src/proto';
+import { createAssistantClient, AppInfo } from '../../src/index';
+
+describe('Проверяем backgroundApps', () => {
+    let server: undefined | Server;
+    const SOCKET_URL = 'ws://test.com';
+    const USER_CHANNEL = 'COMPANION_B2C';
+    const SURFACE = 'COMPANION';
+    const APPS = [
+        {
+            projectId: 'test-1-projectId',
+            applicationId: 'test-1-applicationId',
+            appversionId: 'test-1-appversionId',
+            frontendType: 'EMBEDDED_APP',
+        },
+        {
+            projectId: 'test-2-projectId',
+            applicationId: 'test-2-applicationId',
+            appversionId: 'test-2-appversionId',
+            frontendType: 'WEB_APP',
+        },
+    ];
+
+    const getState = () => Promise.resolve({});
+
+    const initAssistant = () =>
+        createAssistantClient({
+            url: SOCKET_URL,
+            userChannel: USER_CHANNEL,
+            userId: 'webdbg_userid_6f141a9rg4tmt8mvun9x6',
+            getToken: () => Promise.resolve('token'),
+            legacyDevice: undefined,
+            locale: 'ru',
+            device: {
+                surface: SURFACE,
+                platformType: 'web',
+                platformVersion: '1',
+                surfaceVersion: '1',
+                features: '',
+                capabilities: '',
+                deviceId: 'deviceid_rgbohdnn3jr78q03y9duq6',
+                deviceManufacturer: '',
+                deviceModel: '',
+                additionalInfo: '',
+            },
+            settings: {
+                authConnector: 'developer_portal_jwt',
+                dubbing: 1,
+                echo: -1,
+                ttsEngine: '',
+                asrEngine: '',
+                asrAutoStop: -1,
+            },
+            version: 5,
+        });
+
+    const onSocketReady = (callback: (socket: WebSocket) => void) => {
+        server.on('connection', (socket) => {
+            socket.binaryType = 'arraybuffer';
+            initProtocol(socket);
+
+            callback(socket);
+        });
+    };
+
+    const onSocketMessage = (subscriber: (message: Message) => void) => {
+        onSocketReady((socket) => {
+            socket.on('message', (data) => {
+                const message = Message.decode((data as Uint8Array).slice(4));
+
+                subscriber(message);
+            });
+        });
+    };
+
+    beforeEach(() => {
+        cy.stub(window, 'WebSocket').callsFake((url) => new WebSocket(url));
+        server = new Server(SOCKET_URL);
+    });
+
+    afterEach(() => {
+        if (server) {
+            server.stop();
+            server = undefined;
+        }
+    });
+
+    it('Апп добавляется и удаляется', () => {
+        const stubOnSystemMessageApps = cy.stub();
+
+        onSocketMessage((message) => {
+            if (message.systemMessage) {
+                const backgroundApps = JSON.parse(message.systemMessage.data).meta.background_apps;
+                stubOnSystemMessageApps(backgroundApps);
+            }
+        });
+
+        const assistant = initAssistant();
+
+        const backgroundApps = APPS.map((appInfo) => assistant.addBackgroundApp({ appInfo, getState }));
+        assistant.start();
+
+        backgroundApps.forEach((app) => app.remove());
+        assistant.start();
+
+        // eslint-disable-next-line cypress/no-unnecessary-waiting
+        cy.wait(1000).then(() => {
+            expect(stubOnSystemMessageApps).to.calledWith([
+                { app_info: APPS[0], state: {} },
+                { app_info: APPS[1], state: {} },
+            ]);
+            expect(stubOnSystemMessageApps).to.calledWith([]);
+        });
+    });
+
+    it('Подписчики для аппа добавляются и удаляются', () => {
+        const stubOnBackgroundAppCommand = cy.stub();
+
+        const appInfo = APPS[0];
+        const command = {
+            type: 'smart_app_data',
+            smart_app_data: { myData: 'hello' },
+        };
+
+        let sendCommandToApp: (mid: number) => void;
+
+        onSocketReady((socket) => {
+            sendCommandToApp = (mid) => {
+                sendMessage(socket, mid, {
+                    systemMessageData: {
+                        // eslint-disable-next-line @typescript-eslint/camelcase
+                        auto_listening: false,
+                        // eslint-disable-next-line @typescript-eslint/camelcase
+                        app_info: appInfo,
+                        items: [{ command }],
+                    },
+                });
+            };
+        });
+
+        const assistant = initAssistant();
+        const app = assistant.addBackgroundApp({ appInfo, getState });
+        const clearAppSubscribers = app.onCommand(stubOnBackgroundAppCommand).clearSubscribers;
+
+        assistant.start();
+
+        // eslint-disable-next-line cypress/no-unnecessary-waiting
+        cy.wait(1000).then(() => {
+            sendCommandToApp(1234);
+            clearAppSubscribers();
+            sendCommandToApp(1235);
+
+            expect(stubOnBackgroundAppCommand).calledOnceWith(
+                {
+                    ...command,
+                    sdk_meta: {
+                        mid: '1234',
+                        requestId: undefined,
+                    },
+                },
+                '1234',
+            );
+        });
+    });
+
+    it('SystemMessages с сервера для аппа отправляются в этот апп', () => {
+        const stubOnBackgroundApp1Command = cy.stub();
+        const stubOnBackgroundApp2Command = cy.stub();
+
+        const appInfo1 = APPS[0];
+        const appInfo2 = APPS[1];
+        const command = {
+            type: 'smart_app_data',
+            smart_app_data: { myData: 'hello' },
+        };
+
+        let sendCommandToApp: (appInfo: AppInfo, mid: number) => void;
+
+        onSocketReady((socket) => {
+            sendCommandToApp = (app_info, mid) => {
+                sendMessage(socket, mid, {
+                    systemMessageData: {
+                        // eslint-disable-next-line @typescript-eslint/camelcase
+                        auto_listening: false,
+                        // eslint-disable-next-line @typescript-eslint/camelcase
+                        app_info,
+                        items: [{ command }],
+                    },
+                });
+            };
+        });
+
+        const assistant = initAssistant();
+
+        const app1 = assistant.addBackgroundApp({ appInfo: appInfo1, getState });
+        app1.onCommand(stubOnBackgroundApp1Command);
+
+        const app2 = assistant.addBackgroundApp({ appInfo: appInfo2, getState });
+        app2.onCommand(stubOnBackgroundApp2Command);
+
+        assistant.start();
+
+        // eslint-disable-next-line cypress/no-unnecessary-waiting
+        cy.wait(1000).then(() => {
+            sendCommandToApp(appInfo1, 1234);
+            sendCommandToApp(appInfo2, 1235);
+
+            expect(stubOnBackgroundApp1Command).calledOnceWith(
+                {
+                    ...command,
+                    sdk_meta: {
+                        mid: '1234',
+                        requestId: undefined,
+                    },
+                },
+                '1234',
+            );
+
+            expect(stubOnBackgroundApp2Command).calledOnceWith(
+                {
+                    ...command,
+                    sdk_meta: {
+                        mid: '1235',
+                        requestId: undefined,
+                    },
+                },
+                '1235',
+            );
+        });
+    });
+
+    it('ServerAction на сервер отправляется в сценарий аппа', () => {
+        const stubOnServerAction = cy.stub();
+
+        const assistant = initAssistant();
+        const app = assistant.addBackgroundApp({ appInfo: APPS[0], getState });
+
+        assistant.start();
+
+        onSocketMessage((message) => {
+            if (message.systemMessage) {
+                const data = JSON.parse(message.systemMessage.data);
+
+                if (data.app_info?.appversionId === APPS[0].appversionId) {
+                    stubOnServerAction(data.server_action);
+                }
+            }
+        });
+
+        const actionToBackgroundApp = { name: 'Ivan' };
+        const actionToCurrentApp = { name: 'Nicolas' };
+
+        app.sendServerAction(actionToBackgroundApp);
+        assistant.sendServerAction(actionToCurrentApp);
+
+        // eslint-disable-next-line cypress/no-unnecessary-waiting
+        cy.wait(1000).then(() => {
+            expect(stubOnServerAction).calledOnceWith(actionToBackgroundApp);
+        });
+    });
+});