Issue #29319: Prevent RunMainFromImporter overwriting sys.path[0].

1 files changed, 9 insertions, 2 deletions

diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index b63050982a..2c2914fd6d 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -8,7 +8,6 @@ from test.support import (verbose, import_module, cpython_only,
 from test.support.script_helper import assert_python_ok, assert_python_failure
 
 import random
-import re
 import sys
 _thread = import_module('_thread')
 threading = import_module('threading')
@@ -19,6 +18,7 @@ import os
 import subprocess
 
 from test import lock_tests
+from test import support
 
 
 # Between fork() and exec(), only async-safe functions are allowed (issues
@@ -462,7 +462,7 @@ class ThreadTests(BaseTestCase):
         self.addCleanup(sys.setswitchinterval, old_interval)
 
         # Make the bug more likely to manifest.
-        sys.setswitchinterval(1e-6)
+        test.support.setswitchinterval(1e-6)
 
         for i in range(20):
             t = threading.Thread(target=lambda: None)
@@ -1117,5 +1117,12 @@ class BoundedSemaphoreTests(lock_tests.BoundedSemaphoreTests):
 class BarrierTests(lock_tests.BarrierTests):
     barriertype = staticmethod(threading.Barrier)
 
+class MiscTestCase(unittest.TestCase):
+    def test__all__(self):
+        extra = {"ThreadError"}
+        blacklist = {'currentThread', 'activeCount'}
+        support.check__all__(self, threading, ('threading', '_thread'),
+                             extra=extra, blacklist=blacklist)
+
 if __name__ == "__main__":
     unittest.main()