diff --git a/rtree/index.py b/rtree/index.py
index ea9f1349..1ce9eba8 100644
--- a/rtree/index.py
+++ b/rtree/index.py
@@ -1640,7 +1640,7 @@ def initialize_from_dict(self, state: dict[str, Any]) -> None:
                 setattr(self, k, v)
 
         # Consistency checks
-        if 'near_minimum_overlap_factor' not in state:
+        if "near_minimum_overlap_factor" not in state:
             nmof = self.near_minimum_overlap_factor
             ilc = min(self.index_capacity, self.leaf_capacity)
             if nmof >= ilc: