Rename thread to _thread and dummy_thread to _dummy_thread. Issue #2875.
diff --git a/Lib/test/test_thread.py b/Lib/test/test_thread.py
index cff9f81..84d5a9d 100644
--- a/Lib/test/test_thread.py
+++ b/Lib/test/test_thread.py
@@ -2,7 +2,7 @@
 import unittest
 import random
 from test import support
-import thread
+import _thread as thread
 import time