diff --git a/npm/ng-packs/packages/core/src/lib/tests/dynamic-layout.component.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/dynamic-layout.component.spec.ts
index a7ea5486a7..bfd2762760 100644
--- a/npm/ng-packs/packages/core/src/lib/tests/dynamic-layout.component.spec.ts
+++ b/npm/ng-packs/packages/core/src/lib/tests/dynamic-layout.component.spec.ts
@@ -19,7 +19,7 @@ class DummyComponent {
   constructor(public route: ActivatedRoute) {}
 }
 
-xdescribe('DynamicLayoutComponent', () => {
+describe('DynamicLayoutComponent', () => {
   const createComponent = createRoutingFactory({
     component: RouterOutletComponent,
     declareComponent: false,
diff --git a/npm/ng-packs/packages/core/src/lib/tests/locale.provider.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/locale.provider.spec.ts
new file mode 100644
index 0000000000..3fbcab3493
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/tests/locale.provider.spec.ts
@@ -0,0 +1,37 @@
+import { Component, LOCALE_ID } from '@angular/core';
+import { createRoutingFactory, SpectatorHost, SpectatorRouting } from '@ngneat/spectator';
+import { LocalizationService } from '../services';
+import { LocaleProvider, LocaleId } from '../providers';
+import localesMapping from '../constants/different-locales';
+
+@Component({ selector: 'abp-dummy', template: '' })
+export class DummyComponent {}
+
+describe('LocaleProvider', () => {
+  let spectator: SpectatorRouting<DummyComponent>;
+
+  const createComponent = createRoutingFactory({
+    component: DummyComponent,
+    stubsEnabled: false,
+    providers: [
+      { provide: LocalizationService, useValue: { currentLang: 'en-US' } },
+      {
+        provide: LOCALE_ID,
+        useClass: LocaleId,
+        deps: [LocalizationService],
+      },
+    ],
+  });
+
+  describe('#LOCALE_ID', () => {
+    it('should equal to localizationService.currentLang', async () => {
+      spectator = createComponent();
+      const localizationService = spectator.get(LocalizationService);
+
+      expect(spectator.get(LOCALE_ID).valueOf()).toBe(localesMapping['en-US'] || 'en-US');
+
+      localizationService.currentLang = 'tr';
+      expect(spectator.get(LOCALE_ID).valueOf()).toBe(localesMapping['tr'] || 'tr');
+    });
+  });
+});
diff --git a/npm/ng-packs/packages/core/src/lib/tests/router-outlet.component.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/router-outlet.component.spec.ts
index 2f6c7bef17..6707432c03 100644
--- a/npm/ng-packs/packages/core/src/lib/tests/router-outlet.component.spec.ts
+++ b/npm/ng-packs/packages/core/src/lib/tests/router-outlet.component.spec.ts
@@ -2,7 +2,7 @@ import { Spectator, createComponentFactory, createHostFactory } from '@ngneat/sp
 import { RouterTestingModule } from '@angular/router/testing';
 import { RouterOutletComponent } from '../components/router-outlet.component';
 
-xdescribe('RouterOutletComponent', () => {
+describe('RouterOutletComponent', () => {
   let spectator: Spectator<RouterOutletComponent>;
   const createHost = createHostFactory({ component: RouterOutletComponent, imports: [RouterTestingModule] });