1 files changed, 5 insertions, 4 deletions
diff --git a/synapse/config/workers.py b/synapse/config/workers.py
index 7ecf349e4a..b013ffa354 100644
--- a/synapse/config/workers.py
+++ b/synapse/config/workers.py
@@ -328,10 +328,11 @@ class WorkerConfig(Config):
                 )
 
         # type-ignore: the expression `Union[A, B]` is not a Type[Union[A, B]] currently
-        self.instance_map: Dict[
-            str, InstanceLocationConfig
-        ] = parse_and_validate_mapping(
-            instance_map, InstanceLocationConfig  # type: ignore[arg-type]
+        self.instance_map: Dict[str, InstanceLocationConfig] = (
+            parse_and_validate_mapping(
+                instance_map,
+                InstanceLocationConfig,  # type: ignore[arg-type]
+            )
         )
 
         # Map from type of streams to source, c.f. WriterLocations.