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diff --git a/tests/test_syntax/extensions/test_legacy_em.py b/tests/test_syntax/extensions/test_legacy_em.py
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+++ b/tests/test_syntax/extensions/test_legacy_em.py
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+# -*- coding: utf-8 -*-
+"""
+Python Markdown
+
+A Python implementation of John Gruber's Markdown.
+
+Documentation: https://python-markdown.github.io/
+GitHub: https://github.com/Python-Markdown/markdown/
+PyPI: https://pypi.org/project/Markdown/
+
+Started by Manfred Stienstra (http://www.dwerg.net/).
+Maintained for a few years by Yuri Takhteyev (http://www.freewisdom.org).
+Currently maintained by Waylan Limberg (https://github.com/waylan),
+Dmitry Shachnev (https://github.com/mitya57) and Isaac Muse (https://github.com/facelessuser).
+
+Copyright 2007-2018 The Python Markdown Project (v. 1.7 and later)
+Copyright 2004, 2005, 2006 Yuri Takhteyev (v. 0.2-1.6b)
+Copyright 2004 Manfred Stienstra (the original version)
+
+License: BSD (see LICENSE.md for details).
+"""
+
+from __future__ import unicode_literals
+from markdown.test_tools import TestCase
+
+
+class TestLegacyEm(TestCase):
+    def test_legacy_emphasis(self):
+        self.assertMarkdownRenders(
+            '_connected_words_',
+            '<p><em>connected</em>words_</p>',
+            extensions=['legacy_em']
+        )
+
+    def test_legacy_strong(self):
+        self.assertMarkdownRenders(
+            '__connected__words__',
+            '<p><strong>connected</strong>words__</p>',
+            extensions=['legacy_em']
+        )