diff --git a/tiled/server/file_response_with_range.py b/tiled/server/file_response_with_range.py
index 0cbfcb6f7..6d9826d1c 100644
--- a/tiled/server/file_response_with_range.py
+++ b/tiled/server/file_response_with_range.py
@@ -27,7 +27,9 @@ def __init__(
         **kwargs,
     ):
         if (range is not None) and (status_code != HTTP_206_PARTIAL_CONTENT):
-            raise RuntimeError(f"Range requests must have a {HTTP_206_PARTIAL_CONTENT} status code.")
+            raise RuntimeError(
+                f"Range requests must have a {HTTP_206_PARTIAL_CONTENT} status code."
+            )
         self.range = range
         super().__init__(path, status_code, *args, **kwargs)