diff --git a/features/steps/tdd_reference_parser_catalog_lock_steps.py b/features/steps/tdd_reference_parser_catalog_lock_steps.py
index 20425399f..a8a0762f6 100644
--- a/features/steps/tdd_reference_parser_catalog_lock_steps.py
+++ b/features/steps/tdd_reference_parser_catalog_lock_steps.py
@@ -214,9 +214,7 @@ def step_cache_catalog_is_dict(context: Any) -> None:
 def step_all_results_identical(context: Any, count: int) -> None:
     """Verify all threads received the exact same catalog dict contents."""
     results: list[dict[str, list[str]]] = context.catalog_results
-    assert len(results) == count, (
-        f"Expected {count} results, got {len(results)}"
-    )
+    assert len(results) == count, f"Expected {count} results, got {len(results)}"
     first = results[0]
     for i, result in enumerate(results[1:], start=1):
         assert result == first, (