Index: Lib/test/test_linecache.py
===================================================================
--- Lib/test/test_linecache.py	(revision 76658)
+++ Lib/test/test_linecache.py	(working copy)
@@ -83,7 +83,7 @@
         getline = linecache.getline
         try:
             # Create a source file and cache its contents
-            source_name = os.path.join(TEST_PATH, 'linecache_test.py')
+            source_name = support.TESTFN
             source = open(source_name, 'w')
             source.write(SOURCE_1)
             source.close()