diff --git a/.github/workflows/django-tests.yml b/.github/workflows/django-tests.yml
new file mode 100644
index 0000000..88e38ac
--- /dev/null
+++ b/.github/workflows/django-tests.yml
@@ -0,0 +1,32 @@
+name: Python Tests
+
+on:
+  push:
+    branches: '*'
+  pull_request:
+    branches: '*'
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Python 3.12
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.12
+
+    - name: Install Poetry
+      run: |
+        curl -sSL https://install.python-poetry.org | python3 -
+
+    - name: Install dependencies
+      run: |
+        poetry install
+
+    - name: Run tests
+      run: |
+        poetry run python manage.py test
\ No newline at end of file
diff --git a/core/tests.py b/core/tests.py
index 7ce503c..4b033f8 100644
--- a/core/tests.py
+++ b/core/tests.py
@@ -1,3 +1,108 @@
 from django.test import TestCase
+from django.contrib.auth.models import Group
+from django.urls import reverse
+from .utils.initial_data import populate_groups
+from .utils.general import sainitize_username
+from .models import PawUser
+from django.conf import settings
 
-# Create your tests here.
+
+class PopulateGroupTestCase(TestCase):
+    def setUp(self):
+        populate_groups(None, None)
+
+    def test_groups_created(self):
+        self.assertEqual(Group.objects.count(), 2)
+        self.assertEqual(Group.objects.filter(name="Client").count(), 1)
+        self.assertEqual(Group.objects.filter(name="Supporter").count(), 1)
+
+class UsernameSainitizationTestCase(TestCase):
+    def test_sainitize_username(self):
+        self.assertEqual(sainitize_username("test"), "test")
+        self.assertEqual(sainitize_username("test !!"), "test")
+
+class LoginViewTestCase(TestCase):
+    def setUp(self):
+        self.username = "testuser"
+        self.password = "testpassword"
+        self.user = PawUser.objects.create_user(username=self.username, password=self.password)
+
+    def test_login_view(self):
+        url = reverse("login")
+        response = self.client.post(url, {"username": self.username, "password": self.password})
+        self.assertEqual(response.status_code, 302)
+        self.assertEqual(response.url, reverse("home"))
+
+    def test_login_view_invalid(self):
+        url = reverse("login")
+        response = self.client.post(url, {"username": self.username, "password": "invalid"})
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "Please enter a correct username and password")
+    
+    def test_user_language(self):
+        url = reverse("home")
+        self.client.force_login(self.user)
+        response = self.client.get(url)
+        self.assertEqual(response.status_code, 302)
+        self.client.cookies.load(response.cookies)
+        self.assertEqual(self.client.cookies[settings.LANGUAGE_COOKIE_NAME].value, self.user.language)
+        self.assertEqual(response.url, reverse("all_tickets"))
+
+class RegisterViewTestCase(TestCase):
+
+    def test_register_view(self):
+        url = reverse("register")
+        response = self.client.post(url, {"username": "test", "email": "test@example.com", "password": "testtesttesttest", "password_confirm": "testtesttesttest"})
+        self.assertEqual(response.status_code, 302)
+        self.assertEqual(response.url, reverse("login"))
+        self.assertEqual(PawUser.objects.count(), 1)
+        user = PawUser.objects.first()
+        self.assertEqual(user.username, "test")
+        self.assertEqual(user.email, "test@example.com")
+        self.assertTrue(user.check_password("testtesttesttest"))
+        self.assertEqual(user.groups.count(), 0) # No group assigned, might want to give Client group by default
+
+    def test_register_view_password_too_short(self):
+        url = reverse("register")
+        response = self.client.post(url, {"username": "test", "email": "test@example.com", "password": "123456789", "password_confirm": "123456789"})
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "Password must be at least 10 characters long.")
+    
+    def test_register_view_password_mismatch(self):
+        url = reverse("register")
+        response = self.client.post(url, {"username": "test", "email": "test@example.com", "password": "1234567890", "password_confirm": "123456789"})
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "Password and Confirm Password do not match.")
+
+class SettingsViewTestCase(TestCase):
+
+    def test_settings_view(self):
+        url = reverse("settings")
+        response = self.client.get(url)
+        self.assertEqual(response.status_code, 302)
+        self.assertEqual(response.url, "%s?next=%s" % (reverse("login"), reverse("settings")))
+
+        user = PawUser.objects.create_user(username="test", password="testtesttesttest", email="test@example.com")
+        self.client.force_login(user)
+        response = self.client.get(url)
+        self.assertEqual(response.status_code, 200)
+        self.assertContains(response, "Settings")
+
+        response = self.client.post(url, {"language": "fr", "email": "test@example.com"})
+        self.assertEqual(response.status_code, 200)
+        user.refresh_from_db()
+        self.assertEqual(user.language, "fr")
+        self.client.cookies.load(response.cookies)
+        self.assertEqual(self.client.cookies[settings.LANGUAGE_COOKIE_NAME].value, "fr")
+
+        response = self.client.post(url, {"language": "invalid", "email": "test@example.com"})
+        self.assertEqual(response.status_code, 200)
+        self.client.cookies.load(response.cookies)
+        self.assertEqual(self.client.cookies[settings.LANGUAGE_COOKIE_NAME].value, "fr")
+
+        response = self.client.post(url, {"language": "en", "email": "test@example.com"})
+        self.assertEqual(response.status_code, 200)
+        user.refresh_from_db()
+        self.assertEqual(user.language, "en")
+        self.client.cookies.load(response.cookies)
+        self.assertEqual(self.client.cookies[settings.LANGUAGE_COOKIE_NAME].value, "en")