diff --git a/app/libros/__init__.py b/app/library/__init__.py
similarity index 100%
rename from app/libros/__init__.py
rename to app/library/__init__.py
diff --git a/app/libros/admin.py b/app/library/admin.py
similarity index 100%
rename from app/libros/admin.py
rename to app/library/admin.py
diff --git a/app/libros/apps.py b/app/library/apps.py
similarity index 83%
rename from app/libros/apps.py
rename to app/library/apps.py
index bccaec3..0eaf77a 100644
--- a/app/libros/apps.py
+++ b/app/library/apps.py
@@ -3,4 +3,4 @@ from django.apps import AppConfig
 
 class LibrosConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
-    name = "app.libros"
+    name = "app.library"
diff --git a/app/libros/migrations/0002_libros.py b/app/library/migrations/0001_initial.py
similarity index 75%
rename from app/libros/migrations/0002_libros.py
rename to app/library/migrations/0001_initial.py
index d8c9a73..d912c62 100644
--- a/app/libros/migrations/0002_libros.py
+++ b/app/library/migrations/0001_initial.py
@@ -1,17 +1,18 @@
-# Generated by Django 3.2.5 on 2021-07-09 16:33
+# Generated by Django 3.2.5 on 2021-07-14 14:16
 
 from django.db import migrations, models
 
 
 class Migration(migrations.Migration):
 
+    initial = True
+
     dependencies = [
-        ('libros', '0001_initial'),
     ]
 
     operations = [
         migrations.CreateModel(
-            name='Libros',
+            name='Book',
             fields=[
                 ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('title', models.CharField(max_length=255)),
@@ -22,9 +23,9 @@ class Migration(migrations.Migration):
                 ('updated_at', models.DateTimeField(auto_now=True)),
             ],
             options={
-                'verbose_name': 'Libro',
-                'verbose_name_plural': 'Libros',
-                'ordering': ('-created_at',),
+                'verbose_name': 'Book',
+                'verbose_name_plural': 'Books',
+                'ordering': ('created_at',),
             },
         ),
     ]
diff --git a/app/libros/migrations/__init__.py b/app/library/migrations/__init__.py
similarity index 100%
rename from app/libros/migrations/__init__.py
rename to app/library/migrations/__init__.py
diff --git a/app/libros/models.py b/app/library/models.py
similarity index 60%
rename from app/libros/models.py
rename to app/library/models.py
index 9b1f313..e9810eb 100644
--- a/app/libros/models.py
+++ b/app/library/models.py
@@ -1,14 +1,9 @@
-# app/libros/models.py
+# app/Library/models.py
 
-from django.contrib.auth.models import AbstractUser
 from django.db import models
 
 
-class CustomUser(AbstractUser):
-    pass
-
-
-class Libros(models.Model):
+class Book(models.Model):
     title = models.CharField(max_length=255)
     genre = models.CharField(max_length=255)
     year = models.CharField(max_length=4)
@@ -17,9 +12,9 @@ class Libros(models.Model):
     updated_at = models.DateTimeField(auto_now=True)
 
     class Meta:
-        ordering = ("-created_at",)
-        verbose_name = "Libro"
-        verbose_name_plural = "Libros"
+        ordering = ("created_at",)
+        verbose_name = "Book"
+        verbose_name_plural = "Books"
 
     def __str__(self):
         return self.title
diff --git a/app/libros/serializers.py b/app/library/serializers.py
similarity index 59%
rename from app/libros/serializers.py
rename to app/library/serializers.py
index d64b6d3..02fdbea 100644
--- a/app/libros/serializers.py
+++ b/app/library/serializers.py
@@ -1,12 +1,12 @@
-# app/libros/serializers.py
+# app/Library/serializers.py
 
 from rest_framework import serializers
-from .models import Libros
+from .models import Book
 
 
-class LibroSerializer(serializers.ModelSerializer):
+class BookSerializer(serializers.ModelSerializer):
     class Meta:
-        model = Libros
+        model = Book
         fields = "__all__"
         read_only_fields = (
             "id",
diff --git a/app/library/urls.py b/app/library/urls.py
new file mode 100644
index 0000000..90c0cbe
--- /dev/null
+++ b/app/library/urls.py
@@ -0,0 +1,11 @@
+# app/Library/urls.py
+
+from django.urls import path
+from app.library.views import ping, BookList, BookDetails
+
+
+urlpatterns = [
+    path("ping/", ping, name="ping"),
+    path("api/book/", BookList.as_view(), name="book_list"),
+    path("api/book/<int:pk>/", BookDetails.as_view(), name="book_details"),
+]
diff --git a/app/libros/views.py b/app/library/views.py
similarity index 63%
rename from app/libros/views.py
rename to app/library/views.py
index 2b615ad..3bdab84 100644
--- a/app/libros/views.py
+++ b/app/library/views.py
@@ -1,11 +1,11 @@
-# app/libros/views.py
+# app/Library/views.py
 
 from django.http import JsonResponse
 from rest_framework.views import APIView
 from rest_framework.response import Response
 from rest_framework import status
-from .serializers import LibroSerializer
-from .models import Libros
+from .serializers import BookSerializer
+from .models import Book
 
 
 def ping(request):
@@ -13,42 +13,42 @@ def ping(request):
     return JsonResponse(data)
 
 
-class LibrosList(APIView):
+class BookList(APIView):
     def get(self, request):
-        libros = Libros.objects.all().order_by("created_at")
-        serializer = LibroSerializer(libros, many=True)
+        books = Book.objects.all()
+        serializer = BookSerializer(books, many=True)
         return Response(serializer.data, status=status.HTTP_200_OK)
 
     def post(self, request):
-        serializer = LibroSerializer(data=request.data)
+        serializer = BookSerializer(data=request.data)
         if serializer.is_valid():
             serializer.save()
             return Response(serializer.data, status=status.HTTP_201_CREATED)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
 
 
-class LibrosDetails(APIView):
+class BookDetails(APIView):
     def get(self, request, pk):
-        libro = Libros.objects.filter(pk=pk).first()
-        if libro:
-            serializer = LibroSerializer(libro)
+        book = Book.objects.filter(pk=pk).first()
+        if book:
+            serializer = BookSerializer(book)
             return Response(serializer.data, status=status.HTTP_200_OK)
         return Response(status=status.HTTP_404_NOT_FOUND)
 
     def put(self, request, pk):
-        libro = Libros.objects.filter(pk=pk).first()
-        serializer = LibroSerializer(libro, data=request.data)
+        book = Book.objects.filter(pk=pk).first()
+        serializer = BookSerializer(book, data=request.data)
         if serializer.is_valid():
             serializer.save()
             return Response(serializer.data, status=status.HTTP_200_OK)
-        elif not libro:
+        elif not book:
             return Response(serializer.data, status=status.HTTP_404_NOT_FOUND)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
 
     def delete(self, request, pk):
-        libro = Libros.objects.filter(pk=pk).first()
-        if libro:
-            serializer = LibroSerializer(libro)
-            libro.delete()
+        book = Book.objects.filter(pk=pk).first()
+        if book:
+            serializer = BookSerializer(book)
+            book.delete()
             return Response(serializer.data, status=status.HTTP_200_OK)
         return Response(status=status.HTTP_404_NOT_FOUND)
diff --git a/app/libros/migrations/0001_initial.py b/app/libros/migrations/0001_initial.py
deleted file mode 100644
index d29cdf4..0000000
--- a/app/libros/migrations/0001_initial.py
+++ /dev/null
@@ -1,44 +0,0 @@
-# Generated by Django 3.2.5 on 2021-07-04 20:09
-
-import django.contrib.auth.models
-import django.contrib.auth.validators
-from django.db import migrations, models
-import django.utils.timezone
-
-
-class Migration(migrations.Migration):
-
-    initial = True
-
-    dependencies = [
-        ('auth', '0012_alter_user_first_name_max_length'),
-    ]
-
-    operations = [
-        migrations.CreateModel(
-            name='CustomUser',
-            fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('password', models.CharField(max_length=128, verbose_name='password')),
-                ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
-                ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
-                ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')),
-                ('first_name', models.CharField(blank=True, max_length=150, verbose_name='first name')),
-                ('last_name', models.CharField(blank=True, max_length=150, verbose_name='last name')),
-                ('email', models.EmailField(blank=True, max_length=254, verbose_name='email address')),
-                ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')),
-                ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')),
-                ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')),
-                ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.Group', verbose_name='groups')),
-                ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.Permission', verbose_name='user permissions')),
-            ],
-            options={
-                'verbose_name': 'user',
-                'verbose_name_plural': 'users',
-                'abstract': False,
-            },
-            managers=[
-                ('objects', django.contrib.auth.models.UserManager()),
-            ],
-        ),
-    ]
diff --git a/app/libros/urls.py b/app/libros/urls.py
deleted file mode 100644
index d1bba4d..0000000
--- a/app/libros/urls.py
+++ /dev/null
@@ -1,11 +0,0 @@
-# app/libros/urls.py
-
-from django.urls import path
-from app.libros.views import *
-
-
-urlpatterns = [
-    path("ping/", ping, name="ping"),
-    path("api/libros/", LibrosList.as_view(), name="libros_list"),
-    path("api/libros/<int:pk>/", LibrosDetails.as_view(), name="libros_details"),
-]
diff --git a/manage.py b/manage.py
index 88c5155..dfe056c 100755
--- a/manage.py
+++ b/manage.py
@@ -6,7 +6,7 @@ import sys
 
 def main():
     """Run administrative tasks."""
-    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "proyecto.settings")
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "proyect.settings")
     try:
         from django.core.management import execute_from_command_line
     except ImportError as exc:
diff --git a/proyecto/__init__.py b/proyect/__init__.py
similarity index 100%
rename from proyecto/__init__.py
rename to proyect/__init__.py
diff --git a/proyecto/asgi.py b/proyect/asgi.py
similarity index 73%
rename from proyecto/asgi.py
rename to proyect/asgi.py
index ba5272b..4f52d37 100644
--- a/proyecto/asgi.py
+++ b/proyect/asgi.py
@@ -1,5 +1,5 @@
 """
-ASGI config for proyecto project.
+ASGI config for proyect project.
 
 It exposes the ASGI callable as a module-level variable named ``application``.
 
@@ -11,6 +11,6 @@ import os
 
 from django.core.asgi import get_asgi_application
 
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "proyecto.settings")
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "proyect.settings")
 
 application = get_asgi_application()
diff --git a/proyecto/settings.py b/proyect/settings.py
similarity index 93%
rename from proyecto/settings.py
rename to proyect/settings.py
index d7d113d..d828b37 100644
--- a/proyecto/settings.py
+++ b/proyect/settings.py
@@ -1,5 +1,5 @@
 """
-Django settings for proyecto project.
+Django settings for proyect project.
 
 Generated by 'django-admin startproject' using Django 3.2.5.
 
@@ -38,7 +38,7 @@ INSTALLED_APPS = [
     "django.contrib.messages",
     "django.contrib.staticfiles",
     "rest_framework",  # nuevo
-    "app.libros",  # nuevo
+    "app.library",  # nuevo
 ]
 
 MIDDLEWARE = [
@@ -51,7 +51,7 @@ MIDDLEWARE = [
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
 ]
 
-ROOT_URLCONF = "proyecto.urls"
+ROOT_URLCONF = "proyect.urls"
 
 TEMPLATES = [
     {
@@ -69,7 +69,7 @@ TEMPLATES = [
     },
 ]
 
-WSGI_APPLICATION = "proyecto.wsgi.application"
+WSGI_APPLICATION = "proyect.wsgi.application"
 
 
 # Database
@@ -109,11 +109,11 @@ LANGUAGE_CODE = "en-us"
 
 TIME_ZONE = "UTC"
 
-USE_I18N = True
+USE_I18N = False
 
-USE_L10N = True
+USE_L10N = False
 
-USE_TZ = True
+USE_TZ = False
 
 
 # Static files (CSS, JavaScript, Images)
@@ -125,5 +125,3 @@ STATIC_URL = "/static/"
 # https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field
 
 DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
-
-AUTH_USER_MODEL = "libros.CustomUser"
diff --git a/proyect/urls.py b/proyect/urls.py
new file mode 100644
index 0000000..7ac1ac8
--- /dev/null
+++ b/proyect/urls.py
@@ -0,0 +1,8 @@
+# proyect/urls.py
+
+from django.contrib import admin
+from django.urls import path, include
+
+urlpatterns = [
+    path("", include("app.library.urls")),
+]
diff --git a/proyecto/wsgi.py b/proyect/wsgi.py
similarity index 73%
rename from proyecto/wsgi.py
rename to proyect/wsgi.py
index 4893b71..82c3310 100644
--- a/proyecto/wsgi.py
+++ b/proyect/wsgi.py
@@ -1,5 +1,5 @@
 """
-WSGI config for proyecto project.
+WSGI config for proyect project.
 
 It exposes the WSGI callable as a module-level variable named ``application``.
 
@@ -11,6 +11,6 @@ import os
 
 from django.core.wsgi import get_wsgi_application
 
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "proyecto.settings")
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "proyect.settings")
 
 application = get_wsgi_application()
diff --git a/proyecto/urls.py b/proyecto/urls.py
deleted file mode 100644
index 19c11e9..0000000
--- a/proyecto/urls.py
+++ /dev/null
@@ -1,9 +0,0 @@
-# proyecto/urls.py
-
-from django.contrib import admin
-from django.urls import path, include
-
-urlpatterns = [
-    path("admin/", admin.site.urls),
-    path("", include("app.libros.urls")),
-]
diff --git a/pytest.ini b/pytest.ini
index b526df0..1324a85 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,5 +1,5 @@
 [pytest]
-DJANGO_SETTINGS_MODULE = proyecto.settings
+DJANGO_SETTINGS_MODULE = proyect.settings
 
 # Opcional, pero recomendado
 python_files = tests.py test_*.py *_tests.py
\ No newline at end of file
diff --git a/tests/library/test_model.py b/tests/library/test_model.py
new file mode 100644
index 0000000..8b3300f
--- /dev/null
+++ b/tests/library/test_model.py
@@ -0,0 +1,28 @@
+# tests/Library/test_model.py
+
+import pytest
+from app.library.models import Book
+
+
+@pytest.mark.django_db
+def test_book_model():
+
+    ## Given
+    book = Book(
+        title="The foundation",
+        genre="Science fiction",
+        year="1951",
+        author="Isaac Asimov",
+    )
+    book.save()
+
+    ## When
+
+    ## Then
+    assert book.title == "The foundation"
+    assert book.genre == "Science fiction"
+    assert book.year == "1951"
+    assert book.author == "Isaac Asimov"
+    assert book.created_at
+    assert book.updated_at
+    assert str(book) == book.title
diff --git a/tests/libros/test_serializers.py b/tests/library/test_serializers.py
similarity index 75%
rename from tests/libros/test_serializers.py
rename to tests/library/test_serializers.py
index 78c29cd..79de5f2 100644
--- a/tests/libros/test_serializers.py
+++ b/tests/library/test_serializers.py
@@ -1,6 +1,6 @@
-# tests/libros/test_serializers.py
+# tests/Library/test_serializers.py
 
-from app.libros.serializers import LibroSerializer
+from app.library.serializers import BookSerializer
 
 
 def test_valid_libro_serializer():
@@ -10,7 +10,7 @@ def test_valid_libro_serializer():
         "year": "1987",
         "author": "Ray Bradbury",
     }
-    serializer = LibroSerializer(data=valid_serializer_data)
+    serializer = BookSerializer(data=valid_serializer_data)
     assert serializer.is_valid()
     assert serializer.validated_data == valid_serializer_data
     assert serializer.data == valid_serializer_data
@@ -19,10 +19,10 @@ def test_valid_libro_serializer():
 
 def test_invalid_libro_serializer():
     invalid_serializer_data = {
-        "title": "Soy Leyenda",
+        "title": "I am legend",
         "author": "Richard Matheson",
     }
-    serializer = LibroSerializer(data=invalid_serializer_data)
+    serializer = BookSerializer(data=invalid_serializer_data)
     assert not serializer.is_valid()
     assert serializer.validated_data == {}
     assert serializer.data == invalid_serializer_data
diff --git a/tests/libros/test_views.py b/tests/library/test_views.py
similarity index 54%
rename from tests/libros/test_views.py
rename to tests/library/test_views.py
index 88d432b..8039571 100644
--- a/tests/libros/test_views.py
+++ b/tests/library/test_views.py
@@ -1,7 +1,7 @@
-# tests/libros/test_views.py
+# tests/Library/test_views.py
 
 import pytest
-from app.libros.models import Libros
+from app.library.models import Book
 from django.urls import reverse
 
 
@@ -9,15 +9,15 @@ from django.urls import reverse
 def test_add_book(client):
 
     # Given
-    libros = Libros.objects.all()
-    assert len(libros) == 0
+    book = Book.objects.all()
+    assert len(book) == 0
 
     # When
     resp = client.post(
-        reverse("libros_list"),
+        reverse("book_list"),
         {
-            "title": "El fin de la eternidad",
-            "genre": "Ciencia Ficción",
+            "title": "The End of Eternity",
+            "genre": "Sciencie Fiction",
             "author": "Isaac Asimov",
             "year": "1955",
         },
@@ -26,36 +26,36 @@ def test_add_book(client):
 
     # Then
     assert resp.status_code == 201
-    assert resp.data["title"] == "El fin de la eternidad"
+    assert resp.data["title"] == "The End of Eternity"
 
-    libros = Libros.objects.all()
-    assert len(libros) == 1
+    book = Book.objects.all()
+    assert len(book) == 1
 
 
 @pytest.mark.django_db
 def test_get_single_book(client):
 
     # Given
-    libro = Libros.objects.create(
-        title="El fin de la eternidad",
-        genre="Ciencia Ficción",
+    book = Book.objects.create(
+        title="The End of Eternity",
+        genre="Sciencie Fiction",
         author="Isaac Asimov",
         year="1955",
     )
 
     # When
-    resp = client.get(reverse("libros_details", kwargs={"pk": libro.id}))
+    resp = client.get(reverse("book_details", kwargs={"pk": book.id}))
 
     # Then
     assert resp.status_code == 200
-    assert resp.data["title"] == "El fin de la eternidad"
+    assert resp.data["title"] == "The End of Eternity"
 
 
 @pytest.mark.django_db
 def test_get_single_book_incorrect_id(client):
 
     # When
-    resp = client.get(reverse("libros_details", kwargs={"pk": 99}))
+    resp = client.get(reverse("book_details", kwargs={"pk": 99}))
 
     # Then
     assert resp.status_code == 404
@@ -66,50 +66,50 @@ def test_get_all_books(client, faker):
 
     # Given
     def create_random_book():
-        return Libros.objects.create(
+        return Book.objects.create(
             title=faker.name(),
             genre=faker.job(),
             author=faker.name_nonbinary(),
             year=faker.year(),
         )
 
-    libro_1 = create_random_book()
-    libro_2 = create_random_book()
+    book_1 = create_random_book()
+    book_2 = create_random_book()
 
     # When
-    resp = client.get(reverse("libros_list"))
+    resp = client.get(reverse("book_list"))
 
     # Then
     assert resp.status_code == 200
-    assert resp.data[0]["title"] == libro_1.title
-    assert resp.data[1]["title"] == libro_2.title
+    assert resp.data[0]["title"] == book_1.title
+    assert resp.data[1]["title"] == book_2.title
 
 
 @pytest.mark.django_db
 def test_remove_book(client):
 
     # Given
-    libro = Libros.objects.create(
-        title="El fin de la eternidad",
-        genre="Ciencia Ficción",
+    book = Book.objects.create(
+        title="The End of Eternity",
+        genre="Sciencie Fiction",
         author="Isaac Asimov",
         year="1955",
     )
     ## Check exist
-    resp_detail = client.get(reverse("libros_details", kwargs={"pk": libro.id}))
+    resp_detail = client.get(reverse("book_details", kwargs={"pk": book.id}))
     assert resp_detail.status_code == 200
-    assert resp_detail.data["title"] == "El fin de la eternidad"
+    assert resp_detail.data["title"] == "The End of Eternity"
 
     # When
-    resp_delete = client.delete(reverse("libros_details", kwargs={"pk": libro.id}))
-    resp_list = client.get(reverse("libros_list"))
-    rest_new_detail = client.get(reverse("libros_details", kwargs={"pk": libro.id}))
+    resp_delete = client.delete(reverse("book_details", kwargs={"pk": book.id}))
+    resp_list = client.get(reverse("book_list"))
+    rest_new_detail = client.get(reverse("book_details", kwargs={"pk": book.id}))
 
     # Then
     ## Check status delete
     assert resp_delete.status_code == 200
     ## Check return delete
-    assert resp_delete.data["title"] == "El fin de la eternidad"
+    assert resp_delete.data["title"] == "The End of Eternity"
     ## Check status list
     assert resp_list.status_code == 200
     ## Check not item list
@@ -121,15 +121,15 @@ def test_remove_book(client):
 @pytest.mark.django_db
 def test_remove_book_incorrect_id(client):
     # Given
-    libro = Libros.objects.create(
-        title="El fin de la eternidad",
-        genre="Ciencia Ficción",
+    book = Book.objects.create(
+        title="The End of Eternity",
+        genre="Sciencie Fiction",
         author="Isaac Asimov",
         year="1955",
     )
 
     # When
-    resp = client.delete(reverse("libros_details", kwargs={"pk": 99}))
+    resp = client.delete(reverse("book_details", kwargs={"pk": 99}))
 
     # Then
     assert resp.status_code == 404
@@ -139,19 +139,19 @@ def test_remove_book_incorrect_id(client):
 def test_update_book(client):
 
     # Given
-    libro = Libros.objects.create(
-        title="El fin de la eternidad",
-        genre="Ciencia Ficción",
+    book = Book.objects.create(
+        title="The End of Eternity",
+        genre="Sciencie Fiction",
         author="Isaac Asimov",
         year="1955",
     )
 
     # When
     resp = client.put(
-        reverse("libros_details", kwargs={"pk": libro.id}),
+        reverse("book_details", kwargs={"pk": book.id}),
         {
             "title": "Dune",
-            "genre": "Ciencia Ficción",
+            "genre": "Sciencie Fiction",
             "author": "Frank Herbert",
             "year": "1965",
         },
@@ -161,40 +161,40 @@ def test_update_book(client):
     # Then
     assert resp.status_code == 200
     assert resp.data["title"] == "Dune"
-    assert resp.data["genre"] == "Ciencia Ficción"
+    assert resp.data["genre"] == "Sciencie Fiction"
     assert resp.data["author"] == "Frank Herbert"
     assert resp.data["year"] == "1965"
 
-    resp_detail = client.get(reverse("libros_details", kwargs={"pk": libro.id}))
+    resp_detail = client.get(reverse("book_details", kwargs={"pk": book.id}))
     assert resp_detail.status_code == 200
     assert resp_detail.data["title"] == "Dune"
-    assert resp_detail.data["genre"] == "Ciencia Ficción"
+    assert resp_detail.data["genre"] == "Sciencie Fiction"
     assert resp_detail.data["author"] == "Frank Herbert"
     assert resp_detail.data["year"] == "1965"
 
 
 @pytest.mark.django_db
 def test_update_book_incorrect_id(client):
-    resp = client.put(reverse("libros_details", kwargs={"pk": 99}))
+    resp = client.put(reverse("book_details", kwargs={"pk": 99}))
     assert resp.status_code == 404
 
 
 @pytest.mark.django_db
 def test_update_book_invalid_json(client):
     # Given
-    libro = Libros.objects.create(
-        title="El fin de la eternidad",
-        genre="Ciencia Ficción",
+    book = Book.objects.create(
+        title="The End of Eternity",
+        genre="Sciencie Fiction",
         author="Isaac Asimov",
         year="1955",
     )
 
     # When
     resp = client.put(
-        reverse("libros_details", kwargs={"pk": libro.id}),
+        reverse("book_details", kwargs={"pk": book.id}),
         {
             "foo": "Dune",
-            "boo": "Ciencia Ficción",
+            "boo": "Sciencie Fiction",
         },
         content_type="application/json",
     )
diff --git a/tests/libros/test_model.py b/tests/libros/test_model.py
deleted file mode 100644
index 79ce29f..0000000
--- a/tests/libros/test_model.py
+++ /dev/null
@@ -1,30 +0,0 @@
-# tests/libros/test_model.py
-
-import pytest
-
-from app.libros.models import Libros
-
-
-@pytest.mark.django_db
-def test_libros_model():
-
-    ## Given
-    # Creamos un nuevo libro en la base de datos
-    libro = Libros(
-        title="La fundación",
-        genre="Ciencia ficción",
-        year="1951",
-        author="Isaac Asimov",
-    )
-    libro.save()
-
-    ## When
-
-    ## Then
-    assert libro.title == "La fundación"
-    assert libro.genre == "Ciencia ficción"
-    assert libro.year == "1951"
-    assert libro.author == "Isaac Asimov"
-    assert libro.created_at
-    assert libro.updated_at
-    assert str(libro) == libro.title
diff --git a/tests/test_ejemplo.py b/tests/test_ejemplo.py
deleted file mode 100644
index e351af8..0000000
--- a/tests/test_ejemplo.py
+++ /dev/null
@@ -1,3 +0,0 @@
-# Las funciones deben empezar por "test_"
-def test_titulo():
-    assert "canción de hielo y fuego" != "juego de tronos"