diff --git a/Lib/test/test_whichdb.py b/Lib/test/test_whichdb.py
index d1cac1dfc10..77463298999 100644
--- a/Lib/test/test_whichdb.py
+++ b/Lib/test/test_whichdb.py
@@ -28,6 +28,7 @@ def test_whichdb(self):
             name = module.__name__
             if name == 'dumbdbm':
                 continue   # whichdb can't support dumbdbm
+            test.test_support.unlink(_fname)
             f = module.open(_fname, 'c')
             f.close()
             self.assertEqual(name, whichdb.whichdb(_fname))