diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index 1b690cb88bfc57..6a20a1eb03e32b 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -513,9 +513,14 @@ def _sleep_some(cls):
time.sleep(100)
@classmethod
- def _sleep_no_int_handler(cls):
+ def _sleep_some_event(cls, event):
+ event.set()
+ time.sleep(100)
+
+ @classmethod
+ def _sleep_no_int_handler(cls, event):
signal.signal(signal.SIGINT, signal.SIG_DFL)
- cls._sleep_some()
+ cls._sleep_some_event(event)
@classmethod
def _test_sleep(cls, delay):
@@ -525,7 +530,10 @@ def _kill_process(self, meth, target=None):
if self.TYPE == 'threads':
self.skipTest('test not appropriate for {}'.format(self.TYPE))
- p = self.Process(target=target or self._sleep_some)
+ event = self.Event()
+ if not target:
+ target = self._sleep_some_event
+ p = self.Process(target=target, args=(event,))
p.daemon = True
p.start()
@@ -543,8 +551,11 @@ def _kill_process(self, meth, target=None):
self.assertTimingAlmostEqual(join.elapsed, 0.0)
self.assertEqual(p.is_alive(), True)
- # XXX maybe terminating too soon causes the problems on Gentoo...
- time.sleep(1)
+ timeout = support.SHORT_TIMEOUT
+ if not event.wait(timeout):
+ p.terminate()
+ p.join()
+ self.fail(f"event not signaled in {timeout} seconds")
meth(p)
diff --git a/Misc/NEWS.d/next/Tests/2025-05-09-14-54-48.gh-issue-133744.LCquu0.rst b/Misc/NEWS.d/next/Tests/2025-05-09-14-54-48.gh-issue-133744.LCquu0.rst
new file mode 100644
index 00000000000000..f19186db1adb79
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2025-05-09-14-54-48.gh-issue-133744.LCquu0.rst
@@ -0,0 +1,3 @@
+Fix multiprocessing interrupt test. Add an event to synchronize the parent
+process with the child process: wait until the child process starts
+sleeping. Patch by Victor Stinner.
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