diff --git a/libs/tasks/application/src/lib/tasks.service.spec.ts b/libs/tasks/application/src/lib/tasks.service.spec.ts
index b7b160e..85a3af6 100644
--- a/libs/tasks/application/src/lib/tasks.service.spec.ts
+++ b/libs/tasks/application/src/lib/tasks.service.spec.ts
@@ -1,29 +1,45 @@
 import { Test, TestingModule } from '@nestjs/testing';
 import { TasksService } from './tasks.service';
-import { GetAllTasksUseCase } from './use-cases/get-all-tasks.use-case';
+import { TASKS_REPOSITORY, TasksRepository, Task } from '@tasks/domain';
 
 describe('TasksService', () => {
   let service: TasksService;
-  let getAllTasksUseCase: GetAllTasksUseCase;
+  let mockTasksRepository: TasksRepository;
 
   beforeEach(async () => {
+    mockTasksRepository = {
+      findAll: jest.fn(),
+    };
+
     const module: TestingModule = await Test.createTestingModule({
       providers: [
         TasksService,
         {
-          provide: GetAllTasksUseCase,
-          useValue: {
-            execute: jest.fn(),
-          },
+          provide: TASKS_REPOSITORY,
+          useValue: mockTasksRepository,
         },
       ],
     }).compile();
 
     service = module.get<TasksService>(TasksService);
-    getAllTasksUseCase = module.get<GetAllTasksUseCase>(GetAllTasksUseCase);
   });
 
   it('should be defined', () => {
     expect(service).toBeDefined();
   });
+
+  describe('findMany', () => {
+    it('should return all tasks', async () => {
+      const mockTasks = [
+        Task.create('task-1', 'Task 1', 'Description 1', ['category-1']),
+        Task.create('task-2', 'Task 2', 'Description 2', ['category-2']),
+      ];
+      mockTasksRepository.findAll = jest.fn().mockResolvedValue(mockTasks);
+
+      const result = await service.findAll();
+
+      expect(result).toEqual(mockTasks);
+      expect(mockTasksRepository.findAll).toHaveBeenCalled();
+    });
+  });
 });
diff --git a/libs/tasks/application/src/lib/tasks.service.ts b/libs/tasks/application/src/lib/tasks.service.ts
index 35e617c..b71d851 100644
--- a/libs/tasks/application/src/lib/tasks.service.ts
+++ b/libs/tasks/application/src/lib/tasks.service.ts
@@ -1,13 +1,14 @@
-import { Injectable } from '@nestjs/common';
-import { Task } from '@tasks/domain';
-
-import { GetAllTasksUseCase } from './use-cases/get-all-tasks.use-case';
+import { Inject, Injectable } from '@nestjs/common';
+import { Task, TASKS_REPOSITORY, TasksRepository } from '@tasks/domain';
 
 @Injectable()
 export class TasksService {
-  constructor(private readonly getAllTasksUseCase: GetAllTasksUseCase) {}
+  constructor(
+    @Inject(TASKS_REPOSITORY)
+    private readonly tasksRepository: TasksRepository,
+  ) {}
 
   async findAll(): Promise<Task[]> {
-    return await this.getAllTasksUseCase.execute();
+    return await this.tasksRepository.findAll();
   }
 }
diff --git a/libs/tasks/application/src/lib/use-cases/get-all-tasks.use-case.spec.ts b/libs/tasks/application/src/lib/use-cases/get-all-tasks.use-case.spec.ts
new file mode 100644
index 0000000..97b2cd8
--- /dev/null
+++ b/libs/tasks/application/src/lib/use-cases/get-all-tasks.use-case.spec.ts
@@ -0,0 +1,50 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { TasksService } from '../tasks.service';
+import { GetAllTasksUseCase } from './get-all-tasks.use-case';
+import { Task } from '@tasks/domain';
+
+describe('GetAllTasksUseCase', () => {
+  let useCase: GetAllTasksUseCase;
+  let tasksService: TasksService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        GetAllTasksUseCase,
+        {
+          provide: TasksService,
+          useValue: {
+            findAll: jest.fn(),
+          },
+        },
+      ],
+    }).compile();
+
+    useCase = module.get<GetAllTasksUseCase>(GetAllTasksUseCase);
+    tasksService = module.get<TasksService>(TasksService);
+  });
+
+  it('should be defined', () => {
+    expect(useCase).toBeDefined();
+  });
+
+  describe('execute', () => {
+    it('should return all tasks', async () => {
+      const expectedTasks: Task[] = [
+        {
+          id: '1',
+          title: 'Test Task',
+          description: 'Test Description',
+          categories: ['category-1'],
+        },
+      ];
+
+      jest.spyOn(tasksService, 'findAll').mockResolvedValue(expectedTasks);
+
+      const result = await useCase.execute();
+
+      expect(result).toEqual(expectedTasks);
+      expect(tasksService.findAll).toHaveBeenCalled();
+    });
+  });
+});
diff --git a/libs/tasks/application/src/lib/use-cases/get-all-tasks.use-case.ts b/libs/tasks/application/src/lib/use-cases/get-all-tasks.use-case.ts
index 94cfc69..c23cdc5 100644
--- a/libs/tasks/application/src/lib/use-cases/get-all-tasks.use-case.ts
+++ b/libs/tasks/application/src/lib/use-cases/get-all-tasks.use-case.ts
@@ -1,14 +1,13 @@
-import { Inject, Injectable } from '@nestjs/common';
-import { Task, TASKS_REPOSITORY, TasksRepository } from '@tasks/domain';
+import { Injectable } from '@nestjs/common';
+import { Task } from '@tasks/domain';
+
+import { TasksService } from '../tasks.service';
 
 @Injectable()
 export class GetAllTasksUseCase {
-  constructor(
-    @Inject(TASKS_REPOSITORY)
-    private readonly tasksRepository: TasksRepository,
-  ) {}
+  constructor(private readonly tasksService: TasksService) {}
 
   async execute(): Promise<Task[]> {
-    return await this.tasksRepository.findAll();
+    return await this.tasksService.findAll();
   }
 }