diff --git a/.build.yml b/.build.yml
new file mode 100644
index 0000000..0061d73
--- /dev/null
+++ b/.build.yml
@@ -0,0 +1,17 @@
+kind: pipeline
+type: docker
+name: default
+
+image:
+tasks:
+  -
+steps:
+- name: backend
+  image: python:alpine
+  commands:
+  - cd backend
+  - apk add --no-cache gcc musl-dev python3-dev
+  - pip install --upgrade pip && pip install -r requirements.txt
+  - python3 configure.py
+  - coverage run manage.py test
+  - coverage report
diff --git a/backend/.coveragerc b/backend/.coveragerc
new file mode 100644
index 0000000..9cd1bb2
--- /dev/null
+++ b/backend/.coveragerc
@@ -0,0 +1,14 @@
+[run]
+source = .
+
+[report]
+fail_under = 100
+show_missing = True
+skip_covered = True
+omit =
+    */tests/*
+    backend/asgi.py
+    backend/wsgi.py
+    backend/settings.py
+    manage.py
+    configure.py
\ No newline at end of file
diff --git a/backend/authentication/tests/test_auth.py b/backend/authentication/tests/test_auth.py
index 1f01c1d..e1da5b5 100644
--- a/backend/authentication/tests/test_auth.py
+++ b/backend/authentication/tests/test_auth.py
@@ -1,4 +1,6 @@
-from django.test import TestCase, Client
+import json
+
+from django.test import TestCase, Client, RequestFactory
 from nacl.encoding import HexEncoder
 from nacl.signing import SigningKey
 
@@ -7,6 +9,85 @@ from authentication.tests import UserTestCase, SignatureAuthClient
 from hostadmin.models import Domain
 
 
+class AuthorizationTestCase(TestCase):
+
+    def setUp(self):
+        self.client = Client()
+        self.factory = RequestFactory()
+        from nacl.signing import SigningKey
+        self.key = SigningKey.generate()
+        self.signature = self.key.sign("test".encode('utf-8'), encoder=HexEncoder).signature.decode('utf-8')
+        self.data = json.dumps({'a': 'b'})
+        self.signature_with_data = self.key.sign(
+            ("test" + self.data).encode('utf-8'), encoder=HexEncoder).signature.decode('utf-8')
+
+    def test_parse_auth_header(self):
+        request = self.factory.get('/test')
+        from authentication.signature_auth import verify_request
+        with self.assertRaises(ValueError):
+            verify_request(request, "")
+
+    def test_parse_auth_header2(self):
+        request = self.factory.get('/test', HTTP_AUTHORIZATION="Signature ")
+        from authentication.signature_auth import verify_request
+        with self.assertRaises(ValueError):
+            verify_request(request, "")
+
+    def test_parse_auth_header3(self):
+        request = self.factory.get('/test', HTTP_AUTHORIZATION="Signature author@domain")
+        from authentication.signature_auth import verify_request
+        with self.assertRaises(ValueError):
+            verify_request(request, "")
+
+    def test_parse_auth_header4(self):
+        from authentication.signature_auth import verify_request
+        request = self.factory.get('/test', HTTP_AUTHORIZATION="Signature author@domain:" + self.signature)
+        username, domain, signed_data, signature_bytes_hex = verify_request(request, "")
+        self.assertEqual(username, "author")
+        self.assertEqual(domain, "domain")
+        self.assertEqual(signed_data, "http://testserver/test")
+        self.assertEqual(signature_bytes_hex, self.signature)
+
+    def test_parse_auth_header5(self):
+        from authentication.signature_auth import verify_request
+        request = self.factory.post('/test', self.data, content_type="application/json",
+                                    HTTP_AUTHORIZATION="Signature author@domain:" + self.signature_with_data)
+        username, domain, signed_data, signature_bytes_hex = verify_request(request, request.body.decode('utf-8'))
+        self.assertEqual(username, "author")
+        self.assertEqual(domain, "domain")
+        self.assertEqual(signed_data, "http://testserver/test" + self.data)
+        self.assertEqual(signature_bytes_hex, self.signature_with_data)
+
+    def test_parse_auth_header6(self):
+        from authentication.signature_auth import verify_request
+        request = self.factory.put('/test', self.data, content_type="application/json",
+                                   HTTP_AUTHORIZATION="Signature author@domain:" + self.signature_with_data)
+        username, domain, signed_data, signature_bytes_hex = verify_request(request, request.body.decode('utf-8'))
+        self.assertEqual(username, "author")
+        self.assertEqual(domain, "domain")
+        self.assertEqual(signed_data, "http://testserver/test" + self.data)
+        self.assertEqual(signature_bytes_hex, self.signature_with_data)
+
+    def test_parse_auth_header7(self):
+        from authentication.signature_auth import verify_request
+        request = self.factory.delete('/test', HTTP_AUTHORIZATION="Signature author@domain:" + self.signature)
+        username, domain, signed_data, signature_bytes_hex = verify_request(request, request.body.decode('utf-8'))
+        self.assertEqual(username, "author")
+        self.assertEqual(domain, "domain")
+        self.assertEqual(signed_data, "http://testserver/test")
+        self.assertEqual(signature_bytes_hex, self.signature)
+
+    def test_parse_auth_header8(self):
+        from authentication.signature_auth import verify_request
+        request = self.factory.patch('/test', self.data, content_type="application/json",
+                                     HTTP_AUTHORIZATION="Signature author@domain:" + self.signature_with_data)
+        username, domain, signed_data, signature_bytes_hex = verify_request(request, request.body.decode('utf-8'))
+        self.assertEqual(username, "author")
+        self.assertEqual(domain, "domain")
+        self.assertEqual(signed_data, "http://testserver/test" + self.data)
+        self.assertEqual(signature_bytes_hex, self.signature_with_data)
+
+
 class KnownIdentityTestCase(TestCase):
     key = None
 
diff --git a/backend/requirements.txt b/backend/requirements.txt
index e6c7131..1b2aed0 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -4,6 +4,7 @@ cffi==1.15.1
 charset-normalizer==3.1.0
 coreapi==2.3.3
 coreschema==0.0.4
+coverage==7.2.7
 Django==4.2.2
 django-annoying==0.10.6
 django-cors-headers==4.1.0