diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py
index 53695cefb8fded..756cf9bd7719c0 100644
--- a/Lib/test/test_float.py
+++ b/Lib/test/test_float.py
@@ -949,6 +949,7 @@ def test_None_ndigits(self):
             self.assertEqual(x, 2)
             self.assertIsInstance(x, int)
 
+    @support.cpython_only
     def test_round_with_none_arg_direct_call(self):
         for val in [(1.0).__round__(None),
                     round(1.0),
diff --git a/Lib/test/test_int.py b/Lib/test/test_int.py
index 77221dfb6d5aa2..2747d9219255ac 100644
--- a/Lib/test/test_int.py
+++ b/Lib/test/test_int.py
@@ -517,6 +517,7 @@ def test_issue31619(self):
         self.assertEqual(int('1_2_3_4_5_6_7_8_9', 16), 0x123456789)
         self.assertEqual(int('1_2_3_4_5_6_7', 32), 1144132807)
 
+    @support.cpython_only
     def test_round_with_none_arg_direct_call(self):
         for val in [(1).__round__(None),
                     round(1),