4 files changed, 4 insertions, 0 deletions
diff --git a/Lib/test/test_atexit.py b/Lib/test/test_atexit.py
index 172bd25419..c761076c4a 100644
--- a/Lib/test/test_atexit.py
+++ b/Lib/test/test_atexit.py
@@ -143,6 +143,7 @@ class GeneralTest(unittest.TestCase):
         self.assertEqual(l, [5])
 
 
+@support.cpython_only
 class SubinterpreterTest(unittest.TestCase):
 
     def test_callbacks_leak(self):
diff --git a/Lib/test/test_coroutines.py b/Lib/test/test_coroutines.py
index a69583b5f9..2b79a17ea7 100644
--- a/Lib/test/test_coroutines.py
+++ b/Lib/test/test_coroutines.py
@@ -2117,6 +2117,7 @@ class SysSetCoroWrapperTest(unittest.TestCase):
             sys.set_coroutine_wrapper(None)
 
 
+@support.cpython_only
 class CAPITest(unittest.TestCase):
 
     def test_tp_await_1(self):
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index f8e5b369ef..7cc2e57b0d 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -906,6 +906,7 @@ class GeneralModuleTests(unittest.TestCase):
             self.assertEqual(swapped & mask, mask)
             self.assertRaises(OverflowError, func, 1<<34)
 
+    @support.cpython_only
     def testNtoHErrors(self):
         import _testcapi
         s_good_values = [0, 1, 2, 0xffff]
diff --git a/Lib/test/test_tracemalloc.py b/Lib/test/test_tracemalloc.py
index 790ab7ee60..742259b439 100644
--- a/Lib/test/test_tracemalloc.py
+++ b/Lib/test/test_tracemalloc.py
@@ -865,6 +865,7 @@ class TestCommandLine(unittest.TestCase):
                                   b'number of frames',
                                   stderr)
 
+    @unittest.skipIf(_testcapi is None, 'need _testcapi')
     def test_pymem_alloc0(self):
         # Issue #21639: Check that PyMem_Malloc(0) with tracemalloc enabled
         # does not crash.