diff --git a/src/modules/authentication/tests/unit/authentication.mapper.spec.ts b/src/modules/authentication/tests/unit/authentication.mapper.spec.ts
new file mode 100644
index 0000000..02046c8
--- /dev/null
+++ b/src/modules/authentication/tests/unit/authentication.mapper.spec.ts
@@ -0,0 +1,82 @@
+import { AuthenticationMapper } from '@modules/authentication/authentication.mapper';
+import { AuthenticationEntity } from '@modules/authentication/core/domain/authentication.entity';
+import { Type } from '@modules/authentication/core/domain/username.types';
+import {
+  AuthenticationReadModel,
+  AuthenticationWriteModel,
+} from '@modules/authentication/infrastructure/authentication.repository';
+import { AuthenticationResponseDto } from '@modules/authentication/interface/dtos/authentication.response.dto';
+import { Test } from '@nestjs/testing';
+
+const now = new Date('2023-06-21 06:00:00');
+const authenticationEntity: AuthenticationEntity = new AuthenticationEntity({
+  id: '7ca2490b-d04d-4ac5-8d6c-5c416fab922e',
+  props: {
+    userId: '7ca2490b-d04d-4ac5-8d6c-5c416fab922e',
+    password: 'somePassword',
+    usernames: [
+      {
+        name: 'john.doe@email.com',
+        type: Type.EMAIL,
+      },
+      {
+        name: '+33611223344',
+        type: Type.PHONE,
+      },
+    ],
+  },
+  createdAt: now,
+  updatedAt: now,
+});
+const authenticationReadModel: AuthenticationReadModel = {
+  uuid: '7ca2490b-d04d-4ac5-8d6c-5c416fab922e',
+  password: '$2b$10$mpkLb3LGyQGJoPaWNBAGReSQHflXPWMjw5RXpebz8EVIMfHJYZ0Fu',
+  usernames: [
+    {
+      username: 'john.doe@email.com',
+      type: Type.EMAIL,
+    },
+    {
+      username: '+33611223344',
+      type: Type.PHONE,
+    },
+  ],
+  createdAt: now,
+  updatedAt: now,
+};
+
+describe('Authentication Mapper', () => {
+  let authenticationMapper: AuthenticationMapper;
+
+  beforeAll(async () => {
+    const module = await Test.createTestingModule({
+      providers: [AuthenticationMapper],
+    }).compile();
+    authenticationMapper =
+      module.get<AuthenticationMapper>(AuthenticationMapper);
+  });
+
+  it('should be defined', () => {
+    expect(authenticationMapper).toBeDefined();
+  });
+
+  it('should map domain entity to persistence data', async () => {
+    const mapped: AuthenticationWriteModel =
+      authenticationMapper.toPersistence(authenticationEntity);
+    expect(mapped.usernames.create[0].username).toBe('john.doe@email.com');
+    expect(mapped.usernames.create[1].username).toBe('+33611223344');
+  });
+
+  it('should map persisted data to domain entity', async () => {
+    const mapped: AuthenticationEntity = authenticationMapper.toDomain(
+      authenticationReadModel,
+    );
+    expect(mapped.getProps().usernames[1].name).toBe('+33611223344');
+  });
+
+  it('should map domain entity to response', async () => {
+    const mapped: AuthenticationResponseDto =
+      authenticationMapper.toResponse(authenticationEntity);
+    expect(mapped.id).toBe('7ca2490b-d04d-4ac5-8d6c-5c416fab922e');
+  });
+});
diff --git a/src/modules/authentication/tests/unit/core/authentication.entity.spec.ts b/src/modules/authentication/tests/unit/core/authentication.entity.spec.ts
index e4e2655..5f3de63 100644
--- a/src/modules/authentication/tests/unit/core/authentication.entity.spec.ts
+++ b/src/modules/authentication/tests/unit/core/authentication.entity.spec.ts
@@ -36,6 +36,7 @@ describe('Authentication entity create', () => {
     expect(authenticationEntity.id).toBe(
       '165192d4-398a-4469-a16b-98c02cc6f531',
     );
+    expect(authenticationEntity.getProps().password.length).toBe(60);
     expect(authenticationEntity.domainEvents.length).toBe(1);
   });
   it('should create a new authentication entity with 2 usernames', async () => {