Apply suggestion from @methane

Author: methane

Lib/test/test_dict.py

@@ -463,8 +463,13 @@ def test_copy_noncompact(self):
     def test_copy_empty_no_memory(self):
         import _testcapi
         d = {}
+        d_copy = d.copy
         with self.assertRaises(MemoryError):
-            _testcapi.call_with_nomemory(0, 0, d.copy)
+            try:
+                _testcapi.set_nomemory(0)
+                d_copy()
+            finally:
+                _testcapi.remove_mem_hooks()
 
     def test_get(self):
         d = {}