diff --git a/authentik/providers/saml/tests/test_auth_n_request.py b/authentik/providers/saml/tests/test_auth_n_request.py
index f85f05809..b5527b5d5 100644
--- a/authentik/providers/saml/tests/test_auth_n_request.py
+++ b/authentik/providers/saml/tests/test_auth_n_request.py
@@ -2,12 +2,13 @@
 from base64 import b64encode
 
 from django.contrib.sessions.middleware import SessionMiddleware
-from django.http.request import HttpRequest, QueryDict
+from django.http.request import QueryDict
 from django.test import RequestFactory, TestCase
 from guardian.utils import get_anonymous_user
 
 from authentik.crypto.models import CertificateKeyPair
 from authentik.flows.models import Flow
+from authentik.flows.tests.test_planner import dummy_get_response
 from authentik.providers.saml.models import SAMLPropertyMapping, SAMLProvider
 from authentik.providers.saml.processors.assertion import AssertionProcessor
 from authentik.providers.saml.processors.request_parser import AuthNRequestParser
@@ -58,11 +59,6 @@ qNAZMq1DqpibfCBg
 -----END CERTIFICATE-----"""
 
 
-def dummy_get_response(request: HttpRequest):  # pragma: no cover
-    """Dummy get_response for SessionMiddleware"""
-    return None
-
-
 class TestAuthNRequest(TestCase):
     """Test AuthN Request generator and parser"""
 
diff --git a/authentik/stages/authenticator_validate/tests.py b/authentik/stages/authenticator_validate/tests.py
new file mode 100644
index 000000000..f0e604fbe
--- /dev/null
+++ b/authentik/stages/authenticator_validate/tests.py
@@ -0,0 +1,127 @@
+"""Test validator stage"""
+from unittest.mock import MagicMock, patch
+
+from django.contrib.sessions.middleware import SessionMiddleware
+from django.test import TestCase
+from django.test.client import RequestFactory
+from django_otp.plugins.otp_totp.models import TOTPDevice
+from rest_framework.exceptions import ValidationError
+
+from authentik.core.models import User
+from authentik.flows.models import NotConfiguredAction
+from authentik.flows.tests.test_planner import dummy_get_response
+from authentik.providers.oauth2.generators import (
+    generate_client_id,
+    generate_client_secret,
+)
+from authentik.stages.authenticator_duo.models import AuthenticatorDuoStage, DuoDevice
+from authentik.stages.authenticator_validate.api import (
+    AuthenticatorValidateStageSerializer,
+)
+from authentik.stages.authenticator_validate.challenge import (
+    get_challenge_for_device,
+    validate_challenge_code,
+    validate_challenge_duo,
+    validate_challenge_webauthn,
+)
+from authentik.stages.authenticator_webauthn.models import WebAuthnDevice
+
+
+class AuthenticatorValidateStageTests(TestCase):
+    """Test validator stage"""
+
+    def setUp(self) -> None:
+        self.user = User.objects.get(username="akadmin")
+        self.request_factory = RequestFactory()
+
+    def test_stage_validation(self):
+        """Test serializer validation"""
+        self.client.force_login(self.user)
+        serializer = AuthenticatorValidateStageSerializer(
+            data={"name": "foo", "not_configured_action": NotConfiguredAction.CONFIGURE}
+        )
+        self.assertFalse(serializer.is_valid())
+        self.assertIn("not_configured_action", serializer.errors)
+
+    def test_device_challenge_totp(self):
+        """Test device challenge"""
+        request = self.request_factory.get("/")
+        totp_device = TOTPDevice.objects.create(
+            user=self.user, confirmed=True, digits=6
+        )
+        self.assertEqual(get_challenge_for_device(request, totp_device), {})
+        with self.assertRaises(ValidationError):
+            validate_challenge_code("1234", request, self.user)
+
+    def test_device_challenge_webauthn(self):
+        """Test webauthn"""
+        request = self.request_factory.get("/")
+        request.user = self.user
+        middleware = SessionMiddleware(dummy_get_response)
+        middleware.process_request(request)
+        request.session.save()
+
+        webauthn_device = WebAuthnDevice.objects.create(
+            user=self.user,
+            public_key="qwerqwerqre",
+            credential_id="foobarbaz",
+            sign_count=0,
+            rp_id="foo",
+        )
+        challenge = get_challenge_for_device(request, webauthn_device)
+        del challenge["challenge"]
+        self.assertEqual(
+            challenge,
+            {
+                "allowCredentials": [
+                    {
+                        "id": "foobarbaz",
+                        "transports": ["usb", "nfc", "ble", "internal"],
+                        "type": "public-key",
+                    }
+                ],
+                "rpId": "foo",
+                "timeout": 60000,
+                "userVerification": "discouraged",
+            },
+        )
+
+        with self.assertRaises(ValidationError):
+            validate_challenge_webauthn({}, request, self.user)
+
+    def test_device_challenge_duo(self):
+        """Test duo"""
+        request = self.request_factory.get("/")
+        stage = AuthenticatorDuoStage.objects.create(
+            name="test",
+            client_id=generate_client_id(),
+            client_secret=generate_client_secret(),
+            api_hostname="",
+        )
+        duo_device = DuoDevice.objects.create(
+            user=self.user,
+            stage=stage,
+        )
+        duo_mock = MagicMock(
+            auth=MagicMock(
+                return_value={
+                    "result": "allow",
+                    "status": "allow",
+                    "status_msg": "Success. Logging you in...",
+                }
+            )
+        )
+        failed_duo_mock = MagicMock(auth=MagicMock(return_value={"result": "deny"}))
+        with patch(
+            "authentik.stages.authenticator_duo.models.AuthenticatorDuoStage.client",
+            duo_mock,
+        ):
+            self.assertEqual(
+                duo_device.pk, validate_challenge_duo(duo_device.pk, request, self.user)
+            )
+        with patch(
+            "authentik.stages.authenticator_duo.models.AuthenticatorDuoStage.client",
+            failed_duo_mock,
+        ):
+            with self.assertRaises(ValidationError):
+                validate_challenge_duo(duo_device.pk, request, self.user)