diff --git a/npm/ng-packs/packages/theme-basic/testing/src/lib/theme-basic-testing.module.ts b/npm/ng-packs/packages/theme-basic/testing/src/lib/theme-basic-testing.module.ts
index 0bcab2ed08..282e5a2da7 100644
--- a/npm/ng-packs/packages/theme-basic/testing/src/lib/theme-basic-testing.module.ts
+++ b/npm/ng-packs/packages/theme-basic/testing/src/lib/theme-basic-testing.module.ts
@@ -5,7 +5,11 @@ import {
   ValidationErrorComponent,
 } from '@abp/ng.theme.basic';
 import { ModuleWithProviders, NgModule } from '@angular/core';
-import { VALIDATION_ERROR_TEMPLATE, VALIDATION_TARGET_SELECTOR } from '@ngx-validate/core';
+import {
+  VALIDATION_ERROR_TEMPLATE,
+  VALIDATION_INVALID_CLASSES,
+  VALIDATION_TARGET_SELECTOR,
+} from '@ngx-validate/core';
 
 @NgModule({
   exports: [BaseThemeBasicModule],
@@ -26,6 +30,10 @@ export class ThemeBasicTestingModule {
           provide: VALIDATION_TARGET_SELECTOR,
           useValue: '.form-group',
         },
+        {
+          provide: VALIDATION_INVALID_CLASSES,
+          useValue: 'is-invalid',
+        },
       ],
     };
   }