diff --git a/src/tixlbase/tests/test_middleware.py b/src/tixlbase/tests/test_middleware.py
new file mode 100644
index 0000000000..eadd26b511
--- /dev/null
+++ b/src/tixlbase/tests/test_middleware.py
@@ -0,0 +1,66 @@
+from django.test import TestCase, Client
+from django.utils.timezone import now
+from django.conf import settings
+
+from tixlbase.models import Event, Organizer, User
+
+
+class LocaleDeterminationTest(TestCase):
+    """
+    This test case tests various methods around the properties /
+    variations concept.
+    """
+
+    def setUp(self):
+        o = Organizer.objects.create(name='Dummy', slug='dummy')
+        self.event = Event.objects.create(
+            organizer=o, name='Dummy', slug='dummy',
+            date_from=now(),
+        )
+        self.TEST_LOCALE = 'de' if settings.LANGUAGE_CODE == 'en' else 'en'
+        self.TEST_LOCALE_LONG = 'de-AT' if settings.LANGUAGE_CODE == 'en' else 'en-NZ'
+        self.user = User.objects.create_user('dummy@dummy.dummy', 'dummy@dummy.dummy', 'dummy')
+
+    def test_global_default(self):
+        c = Client()
+        response = c.get('/control/')
+        language = response['Content-Language']
+        self.assertEqual(language, settings.LANGUAGE_CODE)
+
+    def test_browser_default(self):
+        c = Client(HTTP_ACCEPT_LANGUAGE=self.TEST_LOCALE)
+        response = c.get('/control/')
+        language = response['Content-Language']
+        self.assertEqual(language, self.TEST_LOCALE)
+
+        c = Client(HTTP_ACCEPT_LANGUAGE=self.TEST_LOCALE_LONG)
+        response = c.get('/control/')
+        language = response['Content-Language']
+        self.assertEqual(language, self.TEST_LOCALE)
+
+    def test_cookie_settings(self):
+        c = Client()
+        cookies = c.cookies
+        cookies[settings.LANGUAGE_COOKIE_NAME] = self.TEST_LOCALE
+        response = c.get('/control/')
+        language = response['Content-Language']
+        self.assertEqual(language, self.TEST_LOCALE)
+
+        cookies[settings.LANGUAGE_COOKIE_NAME] = self.TEST_LOCALE_LONG
+        response = c.get('/control/')
+        language = response['Content-Language']
+        self.assertEqual(language, self.TEST_LOCALE)
+
+    def test_user_settings(self):
+        c = Client()
+        self.user.locale = self.TEST_LOCALE
+        self.user.save()
+        response = c.post('/control/login', {
+            'email': 'dummy@dummy.dummy',
+            'password': 'dummy',
+        })
+        self.assertEqual(response.status_code, 302)
+
+        response = c.get('/control/')
+        language = response['Content-Language']
+        self.assertEqual(language, self.TEST_LOCALE)