diff --git a/Lib/test/test_asyncgen.py b/Lib/test/test_asyncgen.py
index fc3bd7dca..cd33878d6 100644
--- a/Lib/test/test_asyncgen.py
+++ b/Lib/test/test_asyncgen.py
@@ -1835,20 +1835,6 @@ class AsyncGenAsyncioTest(unittest.TestCase):
         res = self.loop.run_until_complete(run())
         self.assertEqual(res, [i * 2 for i in range(1, 10)])
 
-    def test_async_gen_expression_incorrect(self):
-        async def ag():
-            yield 42
-
-        async def run(arg):
-            (x async for x in arg)
-
-        err_msg_async = "'async for' requires an object with " \
-            "__aiter__ method, got .*"
-
-        self.loop.run_until_complete(run(ag()))
-        with self.assertRaisesRegex(TypeError, err_msg_async):
-            self.loop.run_until_complete(run(None))
-
     def test_asyncgen_nonstarted_hooks_are_cancellable(self):
         # See https://bugs.python.org/issue38013
         messages = []
@@ -2035,6 +2021,15 @@ class TestUnawaitedWarnings(unittest.TestCase):
             g.athrow(RuntimeError)
             gc_collect()
 
+    def test_athrow_throws_immediately(self):
+        async def gen():
+            yield 1
+
+        g = gen()
+        msg = "athrow expected at least 1 argument, got 0"
+        with self.assertRaisesRegex(TypeError, msg):
+            g.athrow()
+
     def test_aclose(self):
         async def gen():
             yield 1
diff --git a/Lib/test/test_asyncio/test_sock_lowlevel.py b/Lib/test/test_asyncio/test_sock_lowlevel.py
index a34e15b4d..eb9f2a531 100644
--- a/Lib/test/test_asyncio/test_sock_lowlevel.py
+++ b/Lib/test/test_asyncio/test_sock_lowlevel.py
@@ -1,5 +1,6 @@
 import socket
 import asyncio
+import select
 import sys
 import unittest
 
@@ -257,6 +258,38 @@ class BaseSockTestsMixin:
 
         self.skipTest(skip_reason)
 
+    async def _basetest_sock_accept_racing(self, listener, sock):
+        # gh-153761: cancelling sock_accept() must not let a scheduled
+        # _sock_accept run on the cancelled future.
+        listener.setblocking(False)
+        listener.bind(('127.0.0.1', 0))
+        listener.listen(1)
+        addr = listener.getsockname()
+
+        errors = []
+        self.loop.set_exception_handler(lambda loop, ctx: errors.append(ctx))
+        task = asyncio.create_task(self.loop.sock_accept(listener))
+        await asyncio.sleep(0)
+
+        sock.connect(addr)
+        select.select([listener], [], [], support.SHORT_TIMEOUT)
+
+        self.loop.call_soon(task.cancel)
+        await asyncio.sleep(0)
+        await asyncio.sleep(0)
+
+        with self.assertRaises(asyncio.CancelledError):
+            await task
+        self.assertEqual(errors, [])
+
+        # The pending connection must survive
+        conn, conn_addr = await self.loop.sock_accept(listener)
+        with conn:
+            self.assertEqual(conn_addr, sock.getsockname())
+            sock.setblocking(False)
+            await self.loop.sock_sendall(conn, b'ping')
+            self.assertEqual(await self.loop.sock_recv(sock, 4), b'ping')
+
     def test_sock_client_racing(self):
         with test_utils.run_test_server() as httpd:
             sock = socket.socket()
@@ -280,6 +313,16 @@ class BaseSockTestsMixin:
             self.loop.run_until_complete(asyncio.wait_for(
                 self._basetest_sock_connect_racing(listener, sock), 10))
 
+    def test_sock_accept_racing(self):
+        if sys.platform == 'win32':
+            if isinstance(self.loop, asyncio.ProactorEventLoop):
+                raise unittest.SkipTest('Not relevant to ProactorEventLoop')
+        listener = socket.socket()
+        sock = socket.socket()
+        with listener, sock:
+            self.loop.run_until_complete(asyncio.wait_for(
+                self._basetest_sock_accept_racing(listener, sock), 10))
+
     async def _basetest_huge_content(self, address):
         sock = socket.socket()
         sock.setblocking(False)
diff --git a/Lib/test/test_cmath.py b/Lib/test/test_cmath.py
index 389a3fa0e..a986fd6b8 100644
--- a/Lib/test/test_cmath.py
+++ b/Lib/test/test_cmath.py
@@ -516,6 +516,7 @@ class CMathTests(ComplexesAreIdenticalMixin, unittest.TestCase):
         self.assertFalse(cmath.isinf(1j))
         self.assertFalse(cmath.isinf(NAN))
         self.assertTrue(cmath.isinf(INF))
+        self.assertTrue(cmath.isinf(-INF))
         self.assertTrue(cmath.isinf(complex(INF, 0)))
         self.assertTrue(cmath.isinf(complex(0, INF)))
         self.assertTrue(cmath.isinf(complex(INF, INF)))
diff --git a/Lib/test/test_context.py b/Lib/test/test_context.py
index ef20495dc..f193a3335 100644
--- a/Lib/test/test_context.py
+++ b/Lib/test/test_context.py
@@ -1282,6 +1282,31 @@ class HamtTest(unittest.TestCase):
 
         self.assertIsNone(ref())
 
+    def test_hamt_gc_3(self):
+        # gh-154535: the iterators must be tracked by the GC, otherwise a
+        # cycle running through one is never collected and the HAMT it
+        # holds -- and everything in it -- leaks.
+        A = HashKey(100, 'A')
+
+        container = []
+        h = hamt()
+        h = h.set(A, container)
+
+        hi = h.items()
+        self.assertTrue(gc.is_tracked(hi))
+
+        # Close the cycle: hi -> h -> container -> hi.
+        container.append(hi)
+        ref = weakref.ref(h)
+
+        del h, hi, container
+
+        gc.collect()
+        gc.collect()
+        gc.collect()
+
+        self.assertIsNone(ref())
+
     def test_hamt_in_1(self):
         A = HashKey(100, 'A')
         AA = HashKey(100, 'A')
diff --git a/Lib/test/test_devpoll.py b/Lib/test/test_devpoll.py
index 85e0accb6..5951f8817 100644
--- a/Lib/test/test_devpoll.py
+++ b/Lib/test/test_devpoll.py
@@ -2,6 +2,7 @@
 
 # Initial tests are copied as is from "test_poll.py"
 
+import errno
 import os
 import random
 import select
@@ -112,6 +113,15 @@ class DevPollTests(unittest.TestCase):
         self.assertRaises(ValueError, devpoll.register, fd, select.POLLIN)
         self.assertRaises(ValueError, devpoll.unregister, fd)
 
+    def test_close_error(self):
+        # gh-146205: close() should raise OSError if underlying fd is invalid
+        devpoll = select.devpoll()
+        fd = devpoll.fileno()
+        os.close(fd)
+        with self.assertRaises(OSError) as cm:
+            devpoll.close()
+        self.assertEqual(cm.exception.errno, errno.EBADF)
+
     def test_fd_non_inheritable(self):
         devpoll = select.devpoll()
         self.addCleanup(devpoll.close)
diff --git a/Lib/test/test_epoll.py b/Lib/test/test_epoll.py
index c94946a6a..51405ca7c 100644
--- a/Lib/test/test_epoll.py
+++ b/Lib/test/test_epoll.py
@@ -25,6 +25,7 @@ import errno
 import os
 import select
 import socket
+import sys
 import time
 import unittest
 from test import support
@@ -52,12 +53,11 @@ class TestEPoll(unittest.TestCase):
     def _connected_pair(self):
         client = socket.socket()
         client.setblocking(False)
+        # The connection is either established immediately or in progress.
         try:
             client.connect(('127.0.0.1', self.serverSocket.getsockname()[1]))
         except OSError as e:
             self.assertEqual(e.args[0], errno.EINPROGRESS)
-        else:
-            raise AssertionError("Connect should have raised EINPROGRESS")
         server, addr = self.serverSocket.accept()
 
         self.connections.extend((client, server))
@@ -218,6 +218,9 @@ class TestEPoll(unittest.TestCase):
         self.assertRaises(ValueError, select.epoll().register, -1,
                           select.EPOLLIN)
 
+    @unittest.skipIf(sys.platform.startswith('sunos'),
+                     'unregistering a closed file descriptor succeeds '
+                     'on Solaris')
     def test_unregister_closed(self):
         server, client = self._connected_pair()
         fd = server.fileno()
@@ -259,6 +262,15 @@ class TestEPoll(unittest.TestCase):
         self.assertRaises(ValueError, epoll.register, fd, select.EPOLLIN)
         self.assertRaises(ValueError, epoll.unregister, fd)
 
+    def test_close_error(self):
+        # gh-146205: close() should raise OSError if underlying fd is invalid
+        epoll = select.epoll()
+        fd = epoll.fileno()
+        os.close(fd)
+        with self.assertRaises(OSError) as cm:
+            epoll.close()
+        self.assertEqual(cm.exception.errno, errno.EBADF)
+
     def test_fd_non_inheritable(self):
         epoll = select.epoll()
         self.addCleanup(epoll.close)
diff --git a/Lib/test/test_fork1.py b/Lib/test/test_fork1.py
index a6523bbc5..550faa8a1 100644
--- a/Lib/test/test_fork1.py
+++ b/Lib/test/test_fork1.py
@@ -11,6 +11,7 @@ import unittest
 
 from test.fork_wait import ForkWait
 from test import support
+from test.support import warnings_helper
 
 
 # Skip test if fork does not exist.
@@ -19,6 +20,7 @@ if not support.has_fork_support:
 
 
 class ForkTest(ForkWait):
+    @warnings_helper.ignore_fork_in_thread_deprecation_warnings()
     def test_threaded_import_lock_fork(self):
         """Check fork() in main thread works while a subthread is doing an import"""
         import_started = threading.Event()
@@ -61,7 +63,7 @@ class ForkTest(ForkWait):
             except OSError:
                 pass
 
-
+    @warnings_helper.ignore_fork_in_thread_deprecation_warnings()
     def test_nested_import_lock_fork(self):
         """Check fork() in main thread works while the main thread is doing an import"""
         exitcode = 42
diff --git a/Lib/test/test_kqueue.py b/Lib/test/test_kqueue.py
index e94edcbc1..2649f3a7a 100644
--- a/Lib/test/test_kqueue.py
+++ b/Lib/test/test_kqueue.py
@@ -9,6 +9,8 @@ from test import support
 import time
 import unittest
 
+from test.support import warnings_helper
+
 if not hasattr(select, "kqueue"):
     raise unittest.SkipTest("test works only on BSD")
 
@@ -21,6 +23,20 @@ class TestKQueue(unittest.TestCase):
         self.assertTrue(kq.closed)
         self.assertRaises(ValueError, kq.fileno)
 
+    def test_control_overflowing_timeout(self):
+        # gh-154836: out-of-range timeouts must raise OverflowError,
+        # not a (misleading) TypeError, like select(), poll() and
+        # epoll() do.
+        kq = select.kqueue()
+        self.addCleanup(kq.close)
+        for timeout in (1e300, float('inf'), 2**200):
+            with self.subTest(timeout=timeout):
+                with self.assertRaises(OverflowError):
+                    kq.control(None, 0, timeout)
+        # Non-numbers still raise TypeError.
+        with self.assertRaises(TypeError):
+            kq.control(None, 0, "0.1")
+
     def test_create_event(self):
         from operator import lt, le, gt, ge
 
@@ -252,11 +268,21 @@ class TestKQueue(unittest.TestCase):
         # operations must fail with ValueError("I/O operation on closed ...")
         self.assertRaises(ValueError, kqueue.control, None, 4)
 
+    def test_close_error(self):
+        # gh-146205: close() should raise OSError if underlying fd is invalid
+        kqueue = select.kqueue()
+        fd = kqueue.fileno()
+        os.close(fd)
+        with self.assertRaises(OSError) as cm:
+            kqueue.close()
+        self.assertEqual(cm.exception.errno, errno.EBADF)
+
     def test_fd_non_inheritable(self):
         kqueue = select.kqueue()
         self.addCleanup(kqueue.close)
         self.assertEqual(os.get_inheritable(kqueue.fileno()), False)
 
+    @warnings_helper.ignore_fork_in_thread_deprecation_warnings()
     @support.requires_fork()
     def test_fork(self):
         # gh-110395: kqueue objects must be closed after fork
diff --git a/Lib/test/test_poll.py b/Lib/test/test_poll.py
index 5675db8d1..a15612b91 100644
--- a/Lib/test/test_poll.py
+++ b/Lib/test/test_poll.py
@@ -173,17 +173,25 @@ class PollTests(unittest.TestCase):
     @cpython_only
     def test_poll_c_limits(self):
         try:
+            import _testcapi
             from _testcapi import USHRT_MAX, INT_MAX, UINT_MAX
+            HAVE_PPOLL = getattr(_testcapi, 'HAVE_PPOLL', False)
         except ImportError:
             raise unittest.SkipTest("requires _testcapi")
+
         pollster = select.poll()
         pollster.register(1)
 
         # Issues #15989, #17919
         self.assertRaises(OverflowError, pollster.register, 0, USHRT_MAX + 1)
         self.assertRaises(OverflowError, pollster.modify, 1, USHRT_MAX + 1)
-        self.assertRaises(OverflowError, pollster.poll, INT_MAX + 1)
-        self.assertRaises(OverflowError, pollster.poll, UINT_MAX + 1)
+        if HAVE_PPOLL:
+            MS_TO_NS = 1_000_000
+            tmax = _testcapi.INT64_MAX // MS_TO_NS
+            self.assertRaises(OverflowError, pollster.poll, tmax + 1)
+        else:
+            self.assertRaises(OverflowError, pollster.poll, INT_MAX + 1)
+            self.assertRaises(OverflowError, pollster.poll, UINT_MAX + 1)
 
     @threading_helper.reap_threads
     def test_threaded_poll(self):
diff --git a/Lib/test/test_pty.py b/Lib/test/test_pty.py
index b5407642f..7e4f4828c 100644
--- a/Lib/test/test_pty.py
+++ b/Lib/test/test_pty.py
@@ -1,6 +1,6 @@
 import unittest
 from test.support import (
-    is_android, is_apple_mobile, is_wasm32, reap_children, verbose
+    is_android, is_apple_mobile, is_wasm32, reap_children, verbose, warnings_helper
 )
 from test.support.import_helper import import_module
 
@@ -19,7 +19,6 @@ import select
 import signal
 import socket
 import io # readline
-import warnings
 
 TEST_STRING_1 = b"I wish to buy a fish license.\n"
 TEST_STRING_2 = b"For my pet fish, Eric.\n"
@@ -194,6 +193,7 @@ class PtyTest(unittest.TestCase):
         s2 = _readline(master_fd)
         self.assertEqual(b'For my pet fish, Eric.\n', normalize_output(s2))
 
+    @warnings_helper.ignore_fork_in_thread_deprecation_warnings()
     def test_fork(self):
         debug("calling pty.fork()")
         pid, master_fd = pty.fork()
@@ -229,6 +229,7 @@ class PtyTest(unittest.TestCase):
                 os._exit(2)
             os._exit(4)
         else:
+            self.assertFalse(os.get_inheritable(master_fd))
             debug("Waiting for child (%d) to finish." % pid)
             # In verbose mode, we have to consume the debug output from the
             # child or the child will block, causing this test to hang in the
@@ -295,6 +296,7 @@ class PtyTest(unittest.TestCase):
 
         self.assertEqual(data, b"")
 
+    @warnings_helper.ignore_fork_in_thread_deprecation_warnings()
     def test_spawn_doesnt_hang(self):
         # gh-140482: Do the test in a pty.fork() child to avoid messing
         # with the interactive test runner's terminal settings.
@@ -314,7 +316,7 @@ class PtyTest(unittest.TestCase):
 
             (pid, status) = os.waitpid(pid, 0)
             self.assertEqual(status, 0)
-            self.assertEqual(bytes(buf), b"hi there\r\n")
+            self.assertEqual(buf.take_bytes(), b"hi there\r\n")
         finally:
             os.close(fd)
 
diff --git a/Lib/test/test_reprlib.py b/Lib/test/test_reprlib.py
index 22a55b57c..5a95a05c6 100644
--- a/Lib/test/test_reprlib.py
+++ b/Lib/test/test_reprlib.py
@@ -695,8 +695,11 @@ class LongReprTest(unittest.TestCase):
         source_path_len += 2 * (len(self.longname) + 1)
         # a path separator + `module_name` + ".py"
         source_path_len += len(module_name) + 1 + len(".py")
-        cached_path_len = (source_path_len +
-            len(importlib.util.cache_from_source("x.py")) - len("x.py"))
+        try:
+            cached_path_len = (source_path_len +
+                len(importlib.util.cache_from_source("x.py")) - len("x.py"))
+        except NotImplementedError:
+            cached_path_len = source_path_len
         if os.name == 'nt' and cached_path_len >= 258:
             # Under Windows, the max path len is 260 including C's terminating
             # NUL character.
diff --git a/Lib/test/test_smtplib.py b/Lib/test/test_smtplib.py
index fb3ea34d7..b8aac8c20 100644
--- a/Lib/test/test_smtplib.py
+++ b/Lib/test/test_smtplib.py
@@ -1185,9 +1185,9 @@ class SMTPSimTests(unittest.TestCase):
         self.assertEqual(resp, (235, b'Authentication Succeeded'))
         smtp.close()
 
-    @mock.patch("hmac.HMAC")
+    @hashlib_helper.block_algorithm('md5')
     @mock.patch("smtplib._have_cram_md5_support", False)
-    def testAUTH_CRAM_MD5_blocked(self, hmac_constructor):
+    def testAUTH_CRAM_MD5_blocked(self):
         # CRAM-MD5 is the only "known" method by the server,
         # but it is not supported by the client. In particular,
         # no challenge will ever be sent.
@@ -1198,8 +1198,8 @@ class SMTPSimTests(unittest.TestCase):
         msg = re.escape("No suitable authentication method found.")
         with self.assertRaisesRegex(smtplib.SMTPException, msg):
             smtp.login(sim_auth[0], sim_auth[1])
-        hmac_constructor.assert_not_called()  # call has been bypassed
 
+    @hashlib_helper.block_algorithm('md5')
     @mock.patch("smtplib._have_cram_md5_support", False)
     def testAUTH_CRAM_MD5_blocked_and_fallback(self):
         # Test that PLAIN is tried after CRAM-MD5 failed
@@ -1215,7 +1215,7 @@ class SMTPSimTests(unittest.TestCase):
         ):
             resp = smtp.login(sim_auth[0], sim_auth[1])
         smtp_auth_plain.assert_called_once()
-        smtp_auth_cram_md5.assert_not_called()  # no call to HMAC constructor
+        smtp_auth_cram_md5.assert_not_called()
         self.assertEqual(resp, (235, b'Authentication Succeeded'))
 
     @hashlib_helper.requires_hashdigest('md5', openssl=True)
diff --git a/Lib/test/test_sys_settrace.py b/Lib/test/test_sys_settrace.py
index 640240935..a5e7bbbfa 100644
--- a/Lib/test/test_sys_settrace.py
+++ b/Lib/test/test_sys_settrace.py
@@ -360,6 +360,8 @@ class TraceTestCase(unittest.TestCase):
     # Disable gc collection when tracing, otherwise the
     # deallocators may be traced as well.
     def setUp(self):
+        if os.environ.get('PYTHON_UOPS_OPTIMIZE') == '0':
+            self.skipTest("Line tracing behavior differs when JIT optimizer is disabled")
         self.using_gc = gc.isenabled()
         gc.disable()
         self.addCleanup(sys.settrace, sys.gettrace())
@@ -664,21 +666,18 @@ class TraceTestCase(unittest.TestCase):
             (-2, 'line'),
             (-1, 'line'),
             (-1, 'return'),
-            (1, 'exception'),
             (2, 'line'),
             (1, 'line'),
             (-1, 'call'),
             (-2, 'line'),
             (-1, 'line'),
             (-1, 'return'),
-            (1, 'exception'),
             (2, 'line'),
             (1, 'line'),
             (-1, 'call'),
             (-2, 'line'),
             (-1, 'line'),
             (-1, 'return'),
-            (1, 'exception'),
             (2, 'line'),
             (1, 'line'),
             (-1, 'call'),
@@ -1799,9 +1798,6 @@ class SkipLineEventsTraceTestCase(TraceTestCase):
     def make_tracer():
         return Tracer(trace_line_events=False)
 
-    def test_12_tighterloop(self):
-        TraceTestCase.test_12_tighterloop(self)
-
 
 @support.cpython_only
 class TraceOpcodesTestCase(TraceTestCase):
diff --git a/Lib/test/test_termios.py b/Lib/test/test_termios.py
index ce8392a6c..aa8927c1b 100644
--- a/Lib/test/test_termios.py
+++ b/Lib/test/test_termios.py
@@ -104,7 +104,7 @@ class TestFunctions(unittest.TestCase):
         try:
             termios.tcsendbreak(self.fd, 1)
         except termios.error as exc:
-            if exc.args[0] == errno.ENOTTY and sys.platform.startswith(('freebsd', "netbsd")):
+            if exc.args[0] == errno.ENOTTY and sys.platform.startswith(('freebsd', 'netbsd', 'openbsd', 'dragonfly')):
                 self.skipTest('termios.tcsendbreak() is not supported '
                               'with pseudo-terminals (?) on this platform')
             raise
@@ -180,6 +180,9 @@ class TestFunctions(unittest.TestCase):
         termios.tcflow(self.fd, termios.TCOON)
         termios.tcflow(self.fd, termios.TCIOFF)
         termios.tcflow(self.fd, termios.TCION)
+        # Discard the transmitted STOP and START characters,
+        # otherwise closing the pseudo-terminal can block.
+        termios.tcflush(self.fd, termios.TCOFLUSH)
 
     @support.skip_android_selinux('tcflow')
     def test_tcflow_errors(self):
diff --git a/Lib/test/test_ucn.py b/Lib/test/test_ucn.py
index 2a4496769..e50a85353 100644
--- a/Lib/test/test_ucn.py
+++ b/Lib/test/test_ucn.py
@@ -114,10 +114,10 @@ class UnicodeNamesTest(unittest.TestCase):
     @unittest.expectedFailure  # TODO: RUSTPYTHON; SyntaxError: got unexpected unicode
     def test_tangut_ideographs(self):
         self.checkletter("TANGUT IDEOGRAPH-17000", "\U00017000")
-        self.checkletter("TANGUT IDEOGRAPH-187F7", "\U000187f7")
+        self.checkletter("TANGUT IDEOGRAPH-187FF", "\U000187ff")
         self.checkletter("TANGUT IDEOGRAPH-18D00", "\U00018D00")
-        self.checkletter("TANGUT IDEOGRAPH-18D08", "\U00018d08")
-        self.checkletter("tangut ideograph-18d08", "\U00018d08")
+        self.checkletter("TANGUT IDEOGRAPH-18D1E", "\U00018d1e")
+        self.checkletter("tangut ideograph-18d1e", "\U00018d1e")
 
     def test_egyptian_hieroglyphs(self):
         self.checkletter("EGYPTIAN HIEROGLYPH-13460", "\U00013460")
diff --git a/Lib/test/test_zstd.py b/Lib/test/test_zstd.py
index cf618534a..9225c42e0 100644
--- a/Lib/test/test_zstd.py
+++ b/Lib/test/test_zstd.py
@@ -12,7 +12,6 @@ import threading
 from test.support.import_helper import import_module
 from test.support import threading_helper
 from test.support import _1M
-from test.support import Py_GIL_DISABLED
 
 _zstd = import_module("_zstd")
 zstd = import_module("compression.zstd")
@@ -2374,6 +2373,8 @@ class FileTestCase(unittest.TestCase):
                 f.read(100)
             with self.assertRaises(io.UnsupportedOperation):
                 f.seek(100)
+            with self.assertRaises(io.UnsupportedOperation):
+                next(iter(f))
         self.assertEqual(f.closed, True)
         with self.assertRaises(ValueError):
             f.readable()
diff --git a/crates/vm/src/frame.rs b/crates/vm/src/frame.rs
index 1f386f5f9..e4bf5f966 100644
--- a/crates/vm/src/frame.rs
+++ b/crates/vm/src/frame.rs
@@ -6122,7 +6122,12 @@ impl ExecutingFrame<'_> {
                         Ok(None)
                     }
                     PyIterReturn::StopIteration(value) => {
-                        if vm.use_tracing.get() && self.trace_is_set(vm) {
+                        // CPython's INSTRUMENTED_END_SEND synthesizes this event
+                        // only for generator/coroutine receivers, not other awaitables.
+                        if vm.use_tracing.get()
+                            && self.trace_is_set(vm)
+                            && self.builtin_coro(receiver).is_some()
+                        {
                             let stop_exc = vm.new_stop_iteration(value.clone());
                             self.fire_exception_trace(&stop_exc, vm)?;
                         }
@@ -6190,7 +6195,12 @@ impl ExecutingFrame<'_> {
                         Ok(None)
                     }
                     PyIterReturn::StopIteration(value) => {
-                        if vm.use_tracing.get() && self.trace_is_set(vm) {
+                        // CPython's INSTRUMENTED_END_SEND synthesizes this event
+                        // only for generator/coroutine receivers, not other awaitables.
+                        if vm.use_tracing.get()
+                            && self.trace_is_set(vm)
+                            && self.builtin_coro(receiver).is_some()
+                        {
                             let stop_exc = vm.new_stop_iteration(value.clone());
                             self.fire_exception_trace(&stop_exc, vm)?;
                         }