diff --git a/services/backend/apps/user/test.py b/services/backend/apps/user/test.py
index cad7709..40d3431 100644
--- a/services/backend/apps/user/test.py
+++ b/services/backend/apps/user/test.py
@@ -1,29 +1,60 @@
-from django.core.exceptions import ValidationError
+import json
 from django.test import TestCase
 
 from apps.user.models import User
 
 
-class TestSignUp(TestCase):
-    def test_correct_signup(self):
-        user = User(
-            email="123123@timka.su",
-            password="1321312",
-            username="123123",
+class SignUpAPITestCase(TestCase):
+    def test_successful_sign_up(self):
+        payload = {
+            "email": "user@example.com",
+            "password": "securepassword123",
+            "username": "123",
+        }
+        response = self.client.post(
+            "/api/v1/sign-up",
+            data=json.dumps(payload),
+            content_type="application/json",
         )
-        user.full_clean()
-        user.save()
+        self.assertEqual(response.status_code, 201)
+        self.assertIn("token", response.json())
+        self.assertEqual(User.objects.count(), 1)
 
-    def test_incorrect_mail(self):
-        user = User(
-            email="123123",
-            password="1321312",
-            username="123123123",
+    def test_missing_required_fields(self):
+        payload = {"password": "testpass123", "username": "sffsdf"}
+        response = self.client.post(
+            "/api/v1/sign-up",
+            data=json.dumps(payload),
+            content_type="application/json",
         )
-        with self.assertRaises(ValidationError):
-            user.full_clean()
+        self.assertEqual(response.status_code, 400)
 
-    def test_missing_params(self):
-        user = User(password="123123", username="132131232131")
-        with self.assertRaises(ValidationError):
-            user.full_clean()
+    def test_invalid_email_format(self):
+        payload = {
+            "email": "ervtb uktr bym",
+            "password": "securepassword123",
+            "username": "123",
+        }
+        response = self.client.post(
+            "/api/v1/sign-up",
+            data=json.dumps(payload),
+            content_type="application/json",
+        )
+        self.assertEqual(response.status_code, 400)
+
+    def test_existing_user_conflict(self):
+        User.objects.create(
+            email="existing@example.com", password="existingpass123", username="testing"
+        )
+        payload = {
+            "email": "existing@example.com",
+            "password": "sfsad",
+            "username": "testing",
+        }
+        response = self.client.post(
+            "/api/v1/sign-up",
+            data=json.dumps(payload),
+            content_type="application/json",
+        )
+        self.assertEqual(response.status_code, 409)
+        self.assertIn("detail", response.json())