diff --git a/tiled/_tests/test_access_control.py b/tiled/_tests/test_access_control.py
index 82ae8eb00..8525d7c3f 100644
--- a/tiled/_tests/test_access_control.py
+++ b/tiled/_tests/test_access_control.py
@@ -1,4 +1,3 @@
-import copy
 import json
 
 import numpy
@@ -58,7 +57,7 @@ async def allowed_scopes(self, node, principal, path_parts):
                 )
             remove_scope = node.metadata().get("remove_scope", None)
             if remove_scope in allowed:
-                allowed = copy.copy(allowed)
+                allowed = allowed.copy()
                 allowed.remove(remove_scope)
         return allowed