diff --git a/tests/unit/test_auth_register_password_reset.py b/tests/unit/test_auth_register_password_reset.py
index f2b03f36a..95dcc2cd9 100755
--- a/tests/unit/test_auth_register_password_reset.py
+++ b/tests/unit/test_auth_register_password_reset.py
@@ -26,7 +26,6 @@ from packages.application.auth.register_user_use_case import (
     VerifyEmailUseCase,
 )
 
-
 # ── Test helpers ─────────────────────────────────────────
 
 
@@ -86,26 +85,31 @@ class FakeEmailService:
         self.password_reset_emails = []
 
     def send_verification_email(self, to_email, username, verification_url):
-        self.verification_emails.append({
-            "to": to_email,
-            "username": username,
-            "url": verification_url,
-        })
+        self.verification_emails.append(
+            {
+                "to": to_email,
+                "username": username,
+                "url": verification_url,
+            }
+        )
         self.sent_emails.append(("verification", to_email))
         return self._send_success, self._send_error
 
     def send_password_reset_email(self, to_email, username, reset_url):
-        self.password_reset_emails.append({
-            "to": to_email,
-            "username": username,
-            "url": reset_url,
-        })
+        self.password_reset_emails.append(
+            {
+                "to": to_email,
+                "username": username,
+                "url": reset_url,
+            }
+        )
         self.sent_emails.append(("password_reset", to_email))
         return self._send_success, self._send_error
 
 
 class FailingEmailService:
     """Email service that raises an exception."""
+
     def send_verification_email(self, **kwargs):
         raise RuntimeError("SMTP connection failed")
 
@@ -338,9 +342,7 @@ class TestRegisterUserUseCase:
         repo = FakeUserRepository()
         use_case = self._make_use_case(repo=repo)
 
-        req = RegisterUserRequest(
-            email="a@b.com", password="StrongPass123!", username="u", display_name="D"
-        )
+        req = RegisterUserRequest(email="a@b.com", password="StrongPass123!", username="u", display_name="D")
         response, _ = use_case.execute(req)
 
         assert response.user_id