diff --git a/tests/test_packaging.py b/tests/test_packaging.py
index 9b53854..2107b5d 100644
--- a/tests/test_packaging.py
+++ b/tests/test_packaging.py
@@ -5,11 +5,11 @@ from pathlib import Path
 def test_fd_endpoint_plugin_installed():
     # Find the site-packages directory
     for path in sys.path:
-        if 'site-packages' in path:
+        if "site-packages" in path:
             site_packages = Path(path)
             break
     else:
         raise AssertionError("Could not find site-packages in sys.path")
 
-    plugin_path = site_packages / 'twisted' / 'plugins' / 'fd_endpoint.py'
+    plugin_path = site_packages / "twisted" / "plugins" / "fd_endpoint.py"
     assert plugin_path.exists(), f"fd_endpoint.py not found at {plugin_path}"