diff --git a/profit/run/interface.py b/profit/run/interface.py
index ea5a20d..616cb62 100644
--- a/profit/run/interface.py
+++ b/profit/run/interface.py
@@ -36,7 +36,9 @@ def __init__(
             (
                 variable,
                 spec["dtype"].__name__,
-                () if "size" not in spec or spec["size"] == (1, 1) else (spec["size"][-1],),
+                ()
+                if "size" not in spec or spec["size"] == (1, 1)
+                else (spec["size"][-1],),
             )
             for variable, spec in input_config.items()
         ]