Of course, I forgot one file in r86223.

tests/test_install_scripts.py

@@ -42,7 +42,9 @@ class InstallScriptsTestCase(support.TempdirManager,
         def write_script(name, text):
             expected.append(name)
             f = open(os.path.join(source, name), "w")
+            try:
                 f.write(text)
+            finally:
                 f.close()
 
         write_script("script1.py", ("#! /usr/bin/env python2.3\n"