diff --git a/pystac/stac_object.py b/pystac/stac_object.py
index 157c6d0c2..18fddad27 100644
--- a/pystac/stac_object.py
+++ b/pystac/stac_object.py
@@ -381,14 +381,10 @@ def full_copy(
                     target = cached_target
                 else:
                     target_parent = None
-                    if (
-                        link.rel
-                        in [
-                            pystac.RelType.CHILD,
-                            pystac.RelType.ITEM,
-                        ]
-                        and isinstance(clone, pystac.Catalog)
-                    ):
+                    if link.rel in [
+                        pystac.RelType.CHILD,
+                        pystac.RelType.ITEM,
+                    ] and isinstance(clone, pystac.Catalog):
                         target_parent = clone
                     copied_target = target.full_copy(root=root, parent=target_parent)
                     if root is not None: