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 9e34a2f..1d5f7dd 100644
--- a/src/modules/authentication/tests/unit/core/authentication.entity.spec.ts
+++ b/src/modules/authentication/tests/unit/core/authentication.entity.spec.ts
@@ -1,6 +1,7 @@
 import { AuthenticationEntity } from '@modules/authentication/core/domain/authentication.entity';
 import { CreateAuthenticationProps } from '@modules/authentication/core/domain/authentication.types';
 import { AuthenticationDeletedDomainEvent } from '@modules/authentication/core/domain/events/authentication-deleted.domain-event';
+import { PasswordUpdatedDomainEvent } from '@modules/authentication/core/domain/events/password-updated.domain-event';
 import { Type } from '@modules/authentication/core/domain/username.types';
 
 const createAuthenticationProps: CreateAuthenticationProps = {
@@ -62,3 +63,16 @@ describe('Authentication entity delete', () => {
     );
   });
 });
+describe('Authentication password update', () => {
+  it('should update the password of an authentication entity', async () => {
+    const authenticationEntity: AuthenticationEntity =
+      await AuthenticationEntity.create(createAuthenticationProps);
+    const oldPassword: string = authenticationEntity.getProps().password;
+    await authenticationEntity.updatePassword('@Br@ndN3wP@$$w0rd');
+    expect(authenticationEntity.domainEvents.length).toBe(2);
+    expect(authenticationEntity.domainEvents[1]).toBeInstanceOf(
+      PasswordUpdatedDomainEvent,
+    );
+    expect(authenticationEntity.getProps().password).not.toBe(oldPassword);
+  });
+});
diff --git a/src/modules/authentication/tests/unit/core/update-password.service.spec.ts b/src/modules/authentication/tests/unit/core/update-password.service.spec.ts
index 57ede71..3270f0f 100644
--- a/src/modules/authentication/tests/unit/core/update-password.service.spec.ts
+++ b/src/modules/authentication/tests/unit/core/update-password.service.spec.ts
@@ -8,7 +8,7 @@ import { UpdatePasswordCommand } from '@modules/authentication/core/application/
 
 const updatePasswordRequest: UpdatePasswordRequestDto = {
   userId: '165192d4-398a-4469-a16b-98c02cc6f531',
-  password: '@Br@ndN3wPa$$w0rd',
+  password: '@Br@ndN3wP@$$w0rd',
 };
 
 const mockAuthenticationRepository = {
diff --git a/src/modules/authentication/tests/unit/interface/update-password.grpc.controller.spec.ts b/src/modules/authentication/tests/unit/interface/update-password.grpc.controller.spec.ts
new file mode 100644
index 0000000..3618d37
--- /dev/null
+++ b/src/modules/authentication/tests/unit/interface/update-password.grpc.controller.spec.ts
@@ -0,0 +1,70 @@
+import { IdResponse } from '@mobicoop/ddd-library';
+import { RpcExceptionCode } from '@mobicoop/ddd-library';
+import { UpdatePasswordRequestDto } from '@modules/authentication/interface/grpc-controllers/dtos/update-password.request.dto';
+import { UpdatePasswordGrpcController } from '@modules/authentication/interface/grpc-controllers/update-password.grpc.controller';
+import { CommandBus } from '@nestjs/cqrs';
+import { RpcException } from '@nestjs/microservices';
+import { Test, TestingModule } from '@nestjs/testing';
+
+const updatePasswordRequest: UpdatePasswordRequestDto = {
+  userId: '78153e03-4861-4f58-a705-88526efee53b',
+  password: '@Br@ndN3wP@$$w0rd',
+};
+
+const mockCommandBus = {
+  execute: jest
+    .fn()
+    .mockImplementationOnce(() => '330bd6de-1eb8-450b-8674-0e3c9209f048')
+    .mockImplementationOnce(() => {
+      throw new Error();
+    }),
+};
+
+describe('Update Password Grpc Controller', () => {
+  let updatePasswordGrpcController: UpdatePasswordGrpcController;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        {
+          provide: CommandBus,
+          useValue: mockCommandBus,
+        },
+        UpdatePasswordGrpcController,
+      ],
+    }).compile();
+
+    updatePasswordGrpcController = module.get<UpdatePasswordGrpcController>(
+      UpdatePasswordGrpcController,
+    );
+  });
+
+  afterEach(async () => {
+    jest.clearAllMocks();
+  });
+
+  it('should be defined', () => {
+    expect(updatePasswordGrpcController).toBeDefined();
+  });
+
+  it('should update the password', async () => {
+    jest.spyOn(mockCommandBus, 'execute');
+    const result: IdResponse =
+      await updatePasswordGrpcController.updatePassword(updatePasswordRequest);
+    expect(result).toBeInstanceOf(IdResponse);
+    expect(result.id).toBe('330bd6de-1eb8-450b-8674-0e3c9209f048');
+    expect(mockCommandBus.execute).toHaveBeenCalledTimes(1);
+  });
+
+  it('should throw a generic RpcException', async () => {
+    jest.spyOn(mockCommandBus, 'execute');
+    expect.assertions(3);
+    try {
+      await updatePasswordGrpcController.updatePassword(updatePasswordRequest);
+    } catch (e: any) {
+      expect(e).toBeInstanceOf(RpcException);
+      expect(e.error.code).toBe(RpcExceptionCode.UNKNOWN);
+    }
+    expect(mockCommandBus.execute).toHaveBeenCalledTimes(1);
+  });
+});