diff --git a/tests/pkgs/static_assetspec_nulbyte/__init__.py b/tests/pkgs/static_assetspec_nulbyte/__init__.py
index 5ac6e8cf5..d44b04e93 100644
--- a/tests/pkgs/static_assetspec_nulbyte/__init__.py
+++ b/tests/pkgs/static_assetspec_nulbyte/__init__.py
@@ -1,5 +1,6 @@
 def includeme(config):
     config.add_static_view('/', 'tests:fixtures/static')
     config.add_static_view('/sub', 'tests:fixtures/static/subdir')
-    config.override_asset('tests:fixtures/static/subdir',
-                          'tests:fixtures/static')
+    config.override_asset(
+        'tests:fixtures/static/subdir', 'tests:fixtures/static'
+    )