diff --git a/Lib/test/test_imp.py b/Lib/test/test_imp.py
--- a/Lib/test/test_imp.py
+++ b/Lib/test/test_imp.py
@@ -325,6 +325,7 @@
 self.addCleanup(cleanup)
 # Touch the __init__.py file.
 support.create_empty_file('pep3147/__init__.py')
+ importlib.invalidate_caches()
 expected___file__ = os.sep.join(('.', 'pep3147', '__init__.py'))
 m = __import__('pep3147')
 self.assertEqual(m.__file__, expected___file__, (m.__file__, m.__path__))
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://bugs.python.org/file24646/issue14080.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://bugs.python.org/file24646/issue14080.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>