diff --git a/src/flake8/checker.py b/src/flake8/checker.py
index f323442..d008b98 100644
--- a/src/flake8/checker.py
+++ b/src/flake8/checker.py
@@ -42,7 +42,9 @@ SERIAL_RETRY_ERRNOS = {
 
 def _multiprocessing_is_fork() -> bool:
     """Class state is only preserved when using the `fork` strategy."""
-    return bool(multiprocessing and multiprocessing.get_start_method() == "fork")
+    return bool(
+        multiprocessing and multiprocessing.get_start_method() == "fork"
+    )
 
 
 class Manager: