diff --git a/backend/app/tests/test_config.py b/backend/app/tests/test_config.py
index ff0bd64..ef2e62f 100644
--- a/backend/app/tests/test_config.py
+++ b/backend/app/tests/test_config.py
@@ -6,8 +6,6 @@ previously caused a JSONDecodeError in pydantic_settings v2 before validators
 could run (see: pydantic_settings sources/providers/env.py decode_complex_value).
 """
 
-import pytest
-
 from app.core.config import Settings
 
 
@@ -16,9 +14,7 @@ class TestBackendCorsOriginsValidator:
 
     def test_comma_separated_string(self):
         """Comma-separated origins are split into a list."""
-        settings = Settings(
-            BACKEND_CORS_ORIGINS="http://localhost:3000,http://localhost:5173"
-        )
+        settings = Settings(BACKEND_CORS_ORIGINS="http://localhost:3000,http://localhost:5173")
         assert settings.BACKEND_CORS_ORIGINS == [
             "http://localhost:3000",
             "http://localhost:5173",
@@ -53,9 +49,7 @@ class TestBackendCorsOriginsValidator:
 
     def test_comma_separated_with_spaces(self):
         """Extra whitespace around origins is stripped."""
-        settings = Settings(
-            BACKEND_CORS_ORIGINS=" http://a.example.com , http://b.example.com "
-        )
+        settings = Settings(BACKEND_CORS_ORIGINS=" http://a.example.com , http://b.example.com ")
         assert settings.BACKEND_CORS_ORIGINS == [
             "http://a.example.com",
             "http://b.example.com",