Rename thread to _thread and dummy_thread to _dummy_thread. Issue #2875.
diff --git a/Lib/test/test_threadsignals.py b/Lib/test/test_threadsignals.py
index cbed42c..14bd3b7 100644
--- a/Lib/test/test_threadsignals.py
+++ b/Lib/test/test_threadsignals.py
@@ -1,7 +1,7 @@
 """PyUnit testing that threads honor our signal semantics"""
 
 import unittest
-import thread
+import _thread as thread
 import signal
 import os
 import sys