diff -r 17334c1d9245 Lib/test/test_sched.py
--- a/Lib/test/test_sched.py	Tue Oct 25 10:38:07 2016 +0300
+++ b/Lib/test/test_sched.py	Tue Oct 25 12:11:31 2016 +0300
@@ -172,17 +172,23 @@ class TestCase(unittest.TestCase):
         self.assertEqual(scheduler.queue, [e1, e2, e3, e4, e5])
 
     def test_args_kwargs(self):
-        flag = []
+        l = []
+        def fun(*a, **b):
+            l.append((a, b))
 
-        def fun(*a, **b):
-            flag.append(None)
-            self.assertEqual(a, (1,2,3))
-            self.assertEqual(b, {"foo":1})
-
+        now = time.time()
         scheduler = sched.scheduler(time.time, time.sleep)
-        z = scheduler.enterabs(0.01, 1, fun, argument=(1,2,3), kwargs={"foo":1})
+        scheduler.enterabs(now, 1, fun)
+        scheduler.enterabs(now, 1, fun, argument=(1, 2))
+        scheduler.enterabs(now, 1, fun, argument=('a', 'b'))
+        scheduler.enterabs(now, 1, fun, argument=(1, 2), kwargs={"foo": 3})
         scheduler.run()
-        self.assertEqual(flag, [None])
+        self.assertCountEqual(l, [
+            ((), {}),
+            ((1, 2), {}),
+            (('a', 'b'), {}),
+            ((1, 2), {'foo': 3})
+        ])
 
     def test_run_non_blocking(self):
         l = []