Index: Lib/test/test_threadsignals.py
===================================================================
--- Lib/test/test_threadsignals.py	(révision 88424)
+++ Lib/test/test_threadsignals.py	(copie de travail)
@@ -78,7 +78,14 @@
             lock = thread.allocate_lock()
             lock.acquire()
             signal.alarm(1)
-            self.assertRaises(KeyboardInterrupt, lock.acquire)
+            t1 = time.time()
+            self.assertRaises(KeyboardInterrupt, lock.acquire, timeout=5)
+            dt = time.time() - t1
+            # Checking that KeyboardInterrupt was raised is not sufficient.
+            # We want to assert that lock.acquire() was interrupted because
+            # of the signal, not that the signal handler was called immediately
+            # after timeout return of lock.acquire() (which can fool assertRaises).
+            self.assertLess(dt, 3.0)
         finally:
             signal.signal(signal.SIGALRM, oldalrm)
 
@@ -98,7 +105,11 @@
                 rlock.release()
                 time.sleep(0.01)
             signal.alarm(1)
-            self.assertRaises(KeyboardInterrupt, rlock.acquire)
+            t1 = time.time()
+            self.assertRaises(KeyboardInterrupt, rlock.acquire, timeout=5)
+            dt = time.time() - t1
+            # See rationale above in test_lock_acquire_interruption
+            self.assertLess(dt, 3.0)
         finally:
             signal.signal(signal.SIGALRM, oldalrm)