diff -r 849826a900d2 Lib/test/test_importlib/test_locks.py
--- a/Lib/test/test_importlib/test_locks.py	Tue Oct 25 21:49:19 2016 -0500
+++ b/Lib/test/test_importlib/test_locks.py	Fri Oct 28 09:22:14 2016 +0200
@@ -57,7 +57,7 @@
         def setUp(self):
             try:
                 self.old_switchinterval = sys.getswitchinterval()
-                sys.setswitchinterval(0.000001)
+                support.setswitchinterval(0.000001)
             except AttributeError:
                 self.old_switchinterval = None