diff --git a/tractor/__init__.py b/tractor/__init__.py
index dda1400..cbac0b7 100644
--- a/tractor/__init__.py
+++ b/tractor/__init__.py
@@ -105,7 +105,10 @@ async def _main(
     else:
         # start this local actor as the arbiter
         actor = Arbiter(
-            name or 'arbiter', arbiter_addr=arbiter_addr, **kwargs)
+            name or 'arbiter',
+            arbiter_addr=arbiter_addr,
+            **kwargs
+        )
 
     # ``Actor._async_main()`` creates an internal nursery if one is not
     # provided and thus blocks here until it's main task completes.