diff --git a/msa/black-box-tests/src/test/java/org/thingsboard/server/msa/ui/tests/devicessmoke/AssignToCustomerTest.java b/msa/black-box-tests/src/test/java/org/thingsboard/server/msa/ui/tests/devicessmoke/AssignToCustomerTest.java
index 5a3404cee3..1d1c686d45 100644
--- a/msa/black-box-tests/src/test/java/org/thingsboard/server/msa/ui/tests/devicessmoke/AssignToCustomerTest.java
+++ b/msa/black-box-tests/src/test/java/org/thingsboard/server/msa/ui/tests/devicessmoke/AssignToCustomerTest.java
@@ -15,6 +15,8 @@
  */
 package org.thingsboard.server.msa.ui.tests.devicessmoke;
 
+import io.qameta.allure.Description;
+import io.qameta.allure.Feature;
 import org.openqa.selenium.WebElement;
 import org.testng.annotations.AfterClass;
 import org.testng.annotations.BeforeClass;
@@ -27,16 +29,20 @@ import org.thingsboard.server.msa.ui.pages.CustomerPageHelper;
 import org.thingsboard.server.msa.ui.tabs.AssignDeviceTabHelper;
 import org.thingsboard.server.msa.ui.utils.EntityPrototypes;
 
+import java.util.List;
+
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.thingsboard.server.msa.ui.base.AbstractBasePage.random;
 import static org.thingsboard.server.msa.ui.utils.Const.ENTITY_NAME;
 
+@Feature("Assign to customer")
 public class AssignToCustomerTest extends AbstractDeviceTest {
 
     private AssignDeviceTabHelper assignDeviceTab;
     private CustomerPageHelper customerPage;
     private CustomerId customerId;
     private Device device;
+    private Device device1;
     private String customerName;
 
     @BeforeClass
@@ -46,12 +52,14 @@ public class AssignToCustomerTest extends AbstractDeviceTest {
         Customer customer = testRestClient.postCustomer(EntityPrototypes.defaultCustomerPrototype(ENTITY_NAME + random()));
         customerId = customer.getId();
         customerName = customer.getName();
+        device1 = testRestClient.postDevice("", EntityPrototypes.defaultDevicePrototype("Device " + random()));
     }
 
     @AfterClass
     public void deleteCustomer() {
         deleteCustomerById(customerId);
         deleteCustomerByName("Public");
+        deleteDeviceByName(device1.getName());
     }
 
     @BeforeMethod
@@ -60,7 +68,8 @@ public class AssignToCustomerTest extends AbstractDeviceTest {
         deviceName = device.getName();
     }
 
-    @Test
+    @Test(groups = "smoke")
+    @Description("Assign to customer by right side of device btn")
     public void assignToCustomerByRightSideBtn() {
         sideBarMenuView.goToDevicesPage();
         devicePage.assignBtn(deviceName).click();
@@ -74,7 +83,8 @@ public class AssignToCustomerTest extends AbstractDeviceTest {
         assertIsDisplayed(devicePage.device(deviceName));
     }
 
-    @Test
+    @Test(groups = "smoke")
+    @Description("Assign to customer by 'Assign to customer' btn on details tab")
     public void assignToCustomerFromDetailsTab() {
         sideBarMenuView.goToDevicesPage();
         devicePage.device(deviceName).click();
@@ -93,7 +103,8 @@ public class AssignToCustomerTest extends AbstractDeviceTest {
         assertIsDisplayed(devicePage.device(deviceName));
     }
 
-    @Test
+    @Test(groups = "smoke")
+    @Description("Assign marked device by btn on the top")
     public void assignToCustomerMarkedDevice() {
         sideBarMenuView.goToDevicesPage();
         devicePage.assignMarkedDevices(deviceName);
@@ -107,7 +118,8 @@ public class AssignToCustomerTest extends AbstractDeviceTest {
         assertIsDisplayed(devicePage.device(deviceName));
     }
 
-    @Test
+    @Test(groups = "smoke")
+    @Description("Unassign from customer by right side of device btn")
     public void unassignedFromCustomerByRightSideBtn() {
         device.setCustomerId(customerId);
         testRestClient.postDevice("", device);
@@ -122,7 +134,8 @@ public class AssignToCustomerTest extends AbstractDeviceTest {
         devicePage.assertEntityIsNotPresent(deviceName);
     }
 
-    @Test
+    @Test(groups = "smoke")
+    @Description("Unassign from customer by 'Unassign from customer' btn on details tab")
     public void unassignedFromCustomerFromDetailsTab() {
         device.setCustomerId(customerId);
         testRestClient.postDevice("", device);
@@ -141,7 +154,8 @@ public class AssignToCustomerTest extends AbstractDeviceTest {
         devicePage.assertEntityIsNotPresent(deviceName);
     }
 
-    @Test
+    @Test(groups = "smoke")
+    @Description("Can't assign device on several customer")
     public void assignToSeveralCustomer() {
         device.setCustomerId(customerId);
         testRestClient.postDevice("", device);
@@ -150,11 +164,30 @@ public class AssignToCustomerTest extends AbstractDeviceTest {
         assertIsDisable(devicePage.assignBtnVisible(deviceName));
     }
 
-    @Test
+    @Test(groups = "smoke")
+    @Description("Can't assign public device")
     public void assignPublicDevice() {
         testRestClient.setDevicePublic(device.getId());
 
         sideBarMenuView.goToDevicesPage();
         assertIsDisable(devicePage.assignBtnVisible(deviceName));
     }
+
+    @Test(groups = "smoke")
+    @Description("Assign several devices by btn on the top")
+    public void assignSeveralDevices() {
+        sideBarMenuView.goToDevicesPage();
+        devicePage.assignMarkedDevices(deviceName, device1.getName());
+        assignDeviceTab.assignOnCustomer(customerName);
+        assertIsDisplayed(devicePage.deviceCustomerOnPage(deviceName));
+        assertThat(devicePage.deviceCustomerOnPage(deviceName).getText())
+                .as("Customer added correctly").isEqualTo(customerName);
+        assertThat(devicePage.deviceCustomerOnPage(device1.getName()).getText())
+                .as("Customer added correctly").isEqualTo(customerName);
+
+        sideBarMenuView.customerBtn().click();
+        customerPage.manageCustomersDevicesBtn(customerName).click();
+        List.of(deviceName, device1.getName()).
+                forEach(d -> assertIsDisplayed(devicePage.device(d)));
+    }
 }