diff --git a/src/brad/routing/router.py b/src/brad/routing/router.py
index 15973eea..60e29623 100644
--- a/src/brad/routing/router.py
+++ b/src/brad/routing/router.py
@@ -100,9 +100,7 @@ async def engine_for(
 
         # Check if no engine supports query.
         if valid_locations == 0:
-            raise RuntimeError(
-                "No engine supports query '{}'".format(query.raw_query)
-            )
+            raise RuntimeError("No engine supports query '{}'".format(query.raw_query))
 
         # Check if only one engine supports query.
         if (valid_locations & (valid_locations - 1)) == 0: