diff --git a/tienda_ilusion/don_confiao/forms.py b/tienda_ilusion/don_confiao/forms.py
index 4db321a..0563fa8 100644
--- a/tienda_ilusion/don_confiao/forms.py
+++ b/tienda_ilusion/don_confiao/forms.py
@@ -7,6 +7,7 @@ from .models import Sale, SaleLine
 class ImportProductsForm(forms.Form):
     csv_file = forms.FileField()
 
+
 class PurchaseForm(forms.ModelForm):
     class Meta:
         model = Sale
@@ -20,6 +21,7 @@ class PurchaseForm(forms.ModelForm):
             'date': DateInput(attrs={'type': 'date'})
         }
 
+
 class PurchaseLineForm(forms.ModelForm):
     class Meta:
         model = SaleLine
diff --git a/tienda_ilusion/don_confiao/models.py b/tienda_ilusion/don_confiao/models.py
index 7d7ee0a..a3c2432 100644
--- a/tienda_ilusion/don_confiao/models.py
+++ b/tienda_ilusion/don_confiao/models.py
@@ -1,6 +1,7 @@
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
+
 class Sale(models.Model):
 
     customer = models.CharField(max_length=100)
@@ -23,15 +24,18 @@ class SaleLine(models.Model):
     def __str__(self):
         return f"{self.sale} - {self.product}"
 
+
 class MeasuringUnits(models.TextChoices):
     UNIT = 'UNIT', _('Unit')
 
+
 class ProductCategory(models.Model):
     name = models.CharField(max_length=100, unique=True)
 
     def __str__(self):
         return self.name
 
+
 class Product(models.Model):
     name = models.CharField(max_length=100, unique=True)
     price = models.DecimalField(max_digits=9, decimal_places=2)
diff --git a/tienda_ilusion/don_confiao/tests/__init__.py b/tienda_ilusion/don_confiao/tests/__init__.py
new file mode 100644
index 0000000..e5a0d9b
--- /dev/null
+++ b/tienda_ilusion/don_confiao/tests/__init__.py
@@ -0,0 +1 @@
+#!/usr/bin/env python3
diff --git a/tienda_ilusion/don_confiao/test_products.py b/tienda_ilusion/don_confiao/tests/test_products.py
similarity index 93%
rename from tienda_ilusion/don_confiao/test_products.py
rename to tienda_ilusion/don_confiao/tests/test_products.py
index 0b4e0dc..0c12f74 100644
--- a/tienda_ilusion/don_confiao/test_products.py
+++ b/tienda_ilusion/don_confiao/tests/test_products.py
@@ -1,13 +1,11 @@
 from django.test import Client, TestCase
-from django.contrib.auth.models import AnonymousUser, User
 from django.conf import settings
-
-from .views import import_products, products
-from .models import ProductCategory, Product
+from ..models import ProductCategory, Product
 
 import os
 import json
 
+
 class TestProducts(TestCase):
     def setUp(self):
         self.client = Client()
@@ -54,7 +52,8 @@ class TestProducts(TestCase):
         first_categories = {p["name"]: p["categories"] for p in first_products}
         self._import_csv('example_products2.csv')
         updated_products = self._get_products()
-        updated_categories = {p["name"]: p["categories"] for p in updated_products}
+        updated_categories = {
+            p["name"]: p["categories"] for p in updated_products}
 
         self.assertIn('Cafes', first_categories['Arroz'])
         self.assertNotIn('Granos', first_categories['Arroz'])
@@ -62,7 +61,6 @@ class TestProducts(TestCase):
         self.assertIn('Granos', updated_categories['Arroz'])
         self.assertNotIn('Cafes', updated_categories['Arroz'])
 
-
     def test_update_price(self):
         self._import_csv()
         first_products = self._get_products()
diff --git a/tienda_ilusion/don_confiao/tests.py b/tienda_ilusion/don_confiao/tests/tests.py
similarity index 98%
rename from tienda_ilusion/don_confiao/tests.py
rename to tienda_ilusion/don_confiao/tests/tests.py
index 27b5d3e..771ec89 100644
--- a/tienda_ilusion/don_confiao/tests.py
+++ b/tienda_ilusion/don_confiao/tests/tests.py
@@ -1,5 +1,5 @@
 from django.test import TestCase
-from .models import Sale, SaleLine
+from ..models import Sale, SaleLine
 
 
 class ConfiaoTest(TestCase):
diff --git a/tienda_ilusion/don_confiao/views.py b/tienda_ilusion/don_confiao/views.py
index 1904ab6..4f61508 100644
--- a/tienda_ilusion/don_confiao/views.py
+++ b/tienda_ilusion/don_confiao/views.py
@@ -1,6 +1,6 @@
 from django.shortcuts import render
-from django.http import HttpResponse, HttpResponseRedirect, JsonResponse
-from django.template import loader
+from django.http import HttpResponseRedirect, JsonResponse
+# from django.template import loader
 
 from .models import Sale, Product, ProductCategory
 from .forms import ImportProductsForm, PurchaseForm, LineaFormSet
@@ -8,18 +8,22 @@ from .forms import ImportProductsForm, PurchaseForm, LineaFormSet
 import csv
 import io
 
+
 def index(request):
     return render(request, 'don_confiao/index.html')
 
+
 def buy(request):
     if request.method == "POST":
         sale_form = PurchaseForm(request.POST)
         sale_linea_form = LineaFormSet(request.POST)
-        if sale_form.is_valid():
-            sale_form.save()
-        if sale_linea_form.is_valid():
-            sale_linea_form.save()
-        return HttpResponseRedirect("productos")
+        if sale_form.is_valid() and sale_linea_form.is_valid():
+            sale = sale_form.save()
+            lines = sale_linea_form.save(commit=False)
+            for line in lines:
+                line.sale = sale
+                line.save()
+            return HttpResponseRedirect("compras")
     else:
         sale_form = PurchaseForm()
         sale_linea_form = LineaFormSet()
@@ -32,6 +36,7 @@ def buy(request):
         }
     )
 
+
 def purchases(request):
     purchases = Sale.objects.all()
     context = {
@@ -69,14 +74,17 @@ def import_products(request):
         {'form': form}
     )
 
+
 def _categories_from_csv_string(categories_string, separator="&"):
     categories = categories_string.split(separator)
     clean_categories = [c.strip() for c in categories]
     return [_category_from_name(category) for category in clean_categories]
 
+
 def _category_from_name(name):
     return ProductCategory.objects.get_or_create(name=name)[0]
 
+
 def handle_import_products_file(csv_file):
     data = io.StringIO(csv_file.read().decode('utf-8'))
     reader = csv.DictReader(data, quotechar='"')