Fix test_import failure when run multiple times.
(2.7-only)
diff --git a/Lib/test/test_import.py b/Lib/test/test_import.py
index fc3d001..bdf9443 100644
--- a/Lib/test/test_import.py
+++ b/Lib/test/test_import.py
@@ -263,7 +263,10 @@
                   import imp
             sys.argv.insert(0, C())
             """))
-        script_helper.assert_python_ok(testfn)
+        try:
+            script_helper.assert_python_ok(testfn)
+        finally:
+            unlink(testfn)
 
     def test_bug7732(self):
         source = TESTFN + '.py'