diff --git a/api/core/ops/weave_trace/entities/weave_trace_entity.py b/api/core/ops/weave_trace/entities/weave_trace_entity.py
index 14c127f884..e423f5ccbb 100644
--- a/api/core/ops/weave_trace/entities/weave_trace_entity.py
+++ b/api/core/ops/weave_trace/entities/weave_trace_entity.py
@@ -65,8 +65,11 @@ class WeaveTraceModel(WeaveTokenUsage, WeaveMultiModel):
                 v = replace_text_with_content(data=v)
                 if field_name == "inputs":
                     data = {
-                        "messages": [dict(msg, **{"usage_metadata": usage_metadata, "file_list": file_list}) for msg in
-                                     v] if isinstance(v, list) else v,
+                        "messages": [
+                            dict(msg, **{"usage_metadata": usage_metadata, "file_list": file_list}) for msg in v
+                        ]
+                        if isinstance(v, list)
+                        else v,
                     }
                 elif field_name == "outputs":
                     data = {