diff --git a/hypothesis-python/src/hypothesis/internal/conjecture/engine.py b/hypothesis-python/src/hypothesis/internal/conjecture/engine.py
index 746130ac1e..63494a583b 100644
--- a/hypothesis-python/src/hypothesis/internal/conjecture/engine.py
+++ b/hypothesis-python/src/hypothesis/internal/conjecture/engine.py
@@ -236,9 +236,7 @@ def __init__(
         self.best_observed_targets: "defaultdict[str, float]" = defaultdict(
             lambda: NO_SCORE
         )
-        self.best_examples_of_observed_targets: Dict[
-            str, ConjectureResult
-        ] = {}
+        self.best_examples_of_observed_targets: Dict[str, ConjectureResult] = {}
 
         # We keep the pareto front in the example database if we have one. This
         # is only marginally useful at present, but speeds up local development