gh-116738: Fix `test_json_mutating_exact_dict` (#138339)

Fix test_json_mutating_exact_dic

diff --git a/Lib/test/test_free_threading/test_json.py b/Lib/test/test_free_threading/test_json.py
index 8a541e960a63ad61441dda9929749931e99f56b7..010eb322a15b844e7d01799e0af1b6e33a64c09b 100644 (file)
--- a/Lib/test/test_free_threading/test_json.py
+++ b/Lib/test/test_free_threading/test_json.py
@@ -56,7 +56,7 @@ class TestJsonEncoding(CTest):
                     if len(d) > 5:
                         try:
                             key = list(d)[0]
-                            d.pop()
+                            d.pop(key)
                         except (KeyError, IndexError):
                             pass
                     else: