diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 5b5198d..59f8c41 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -24,7 +24,7 @@
         fp.close()
 
     def tearDown(self):
-        os.unlink(support.TESTFN)
+        support.unlink(support.TESTFN)
 
     def testNoArgFunctions(self):
         # test posix functions which take no arguments and have
@@ -249,7 +249,7 @@
                 _create_and_do_getcwd(dirname)
 
             finally:
-                shutil.rmtree(base_path)
+                support.rmtree(base_path)
                 os.chdir(curdir)