diff --git a/boilermaker/sample.py b/boilermaker/sample.py
index a9b998c..e6e140a 100644
--- a/boilermaker/sample.py
+++ b/boilermaker/sample.py
@@ -19,7 +19,9 @@ async def debug_task(state):
 STATIC_DEBUG_TASK.payload = {"args": [], "kwargs": {}}
 
 
-async def debug_task_retry_policy(state, use_default: bool, msg: str = "RETRY TEST", max_tries=5, delay=30, delay_max=600):
+async def debug_task_retry_policy(
+    state, use_default: bool, msg: str = "RETRY TEST", max_tries=5, delay=30, delay_max=600
+):
     """
     This task does nothing.
     """