diff --git a/hypothesis-python/src/hypothesis/extra/ghostwriter.py b/hypothesis-python/src/hypothesis/extra/ghostwriter.py
index 99f56b3b00..1ea7b760e2 100644
--- a/hypothesis-python/src/hypothesis/extra/ghostwriter.py
+++ b/hypothesis-python/src/hypothesis/extra/ghostwriter.py
@@ -603,7 +603,8 @@ def _imports_for_strategy(strategy):
         ):
             return {
                 imp
-                for arg in set(strategy._LazyStrategy__args) | set(strategy._LazyStrategy__kwargs.values())
+                for arg in set(strategy._LazyStrategy__args)
+                | set(strategy._LazyStrategy__kwargs.values())
                 for imp in _imports_for_object(arg)
             }
         elif _get_module(strategy.function).startswith("hypothesis.extra."):