diff --git a/Makefile b/Makefile
index 7bb3338..88e8ae2 100644
--- a/Makefile
+++ b/Makefile
@@ -6,13 +6,12 @@ run: venv
 	python3 sensors
 
 test: venv/development
-	pytest --cov=. --cov-report=term
+	pytest --cov=. --cov-report=term sensors/
 
 venv/development:
 	test -d venv || python3 -m venv venv
 	( \
 	source venv/bin/activate; \
-	pip3 install -e .; \
 	pip3 install -r requirements/development.txt; \
 	)
 	touch venv/development
@@ -21,7 +20,7 @@ venv:
 	test -d venv || python3 -m venv venv
 	( \
 	source venv/bin/activate; \
-	pip3 install .; \
+	pip3 install -r requirements/base.txt; \
 	)
 
 venv/bin/activate: venv
diff --git a/requirements/development.txt b/requirements/development.txt
index 7521f23..660df3a 100644
--- a/requirements/development.txt
+++ b/requirements/development.txt
@@ -2,6 +2,7 @@
 
 pytest
 pytest-cov
+pytest-django
 pep8
 rope
 pylint
diff --git a/sensors/collector/models.py b/sensors/collector/models.py
index b471c2f..f52d1fe 100644
--- a/sensors/collector/models.py
+++ b/sensors/collector/models.py
@@ -1,21 +1,21 @@
 from django.db import models
 
-# Create your models here.
+
 class Time(models.Model):
-    value = DateTimeField()
+    value = models.DateTimeField()
 
 
 class Temperatur(models.Model):
-    time = ForeignKeyField(Time, backref='temperatures')
-    value = FloatField()
+    time = models.ForeignKey(Time, on_delete=models.CASCADE)
+    value = models.FloatField()
 
 
 class Humidity(models.Model):
-    time = ForeignKeyField(Time, backref='humidities')
-    value = FloatField()
+    time = models.ForeignKey(Time, on_delete=models.CASCADE)
+    value = models.FloatField()
 
 
 class Pressure(models.Model):
-    time = ForeignKeyField(Time, backref='pressures')
-    value = FloatField()
+    time = models.ForeignKey(Time, on_delete=models.CASCADE)
+    value = models.FloatField()
 
diff --git a/sensors/collector/tests.py b/sensors/collector/tests.py
index 7ce503c..e809ba3 100644
--- a/sensors/collector/tests.py
+++ b/sensors/collector/tests.py
@@ -1,3 +1,11 @@
+import pytest
 from django.test import TestCase
 
-# Create your tests here.
+
+pytestmark=pytest.mark.django_db
+
+
+def test_create_temperatur():
+    time = models.Time.create(value=datetime.datetime.now)
+    temp = models.Temperatur.create(value=20.0, time=time)
+    assert False
diff --git a/sensors/sensors/settings/base.py b/sensors/sensors/settings/base.py
index 4e33c75..c922948 100644
--- a/sensors/sensors/settings/base.py
+++ b/sensors/sensors/settings/base.py
@@ -29,6 +29,7 @@ INSTALLED_APPS = [
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
+    'collector.apps.CollectorConfig',
 ]
 
 MIDDLEWARE = [
diff --git a/sensors/sensors/urls.py b/sensors/sensors/urls.py
index 3b94ca1..fafe8da 100644
--- a/sensors/sensors/urls.py
+++ b/sensors/sensors/urls.py
@@ -13,9 +13,7 @@ Including another URLconf
     1. Import the include() function: from django.urls import include, path
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
-from django.contrib import admin
 from django.urls import path
 
 urlpatterns = [
-    path('admin/', admin.site.urls),
 ]