#17315: unlink a file that test_posixpath was leaving around.
diff --git a/Lib/test/test_posixpath.py b/Lib/test/test_posixpath.py
index 5d0f5b7..262e09d 100644
--- a/Lib/test/test_posixpath.py
+++ b/Lib/test/test_posixpath.py
@@ -421,6 +421,7 @@
             support.unlink(ABSTFN+"2")
             support.unlink(ABSTFN+"y")
             support.unlink(ABSTFN+"c")
+            support.unlink(ABSTFN+"a")
 
     @unittest.skipUnless(hasattr(os, "symlink"),
                          "Missing symlink implementation")