def METHOD_NAME(self):
    """Test double escaping an end."""
    self.check_markdown(
        r'''
        \begin{align}3+2\\\end{align}
        ''',
        r'''
        <div class="arithmatex">
        <div class="MathJax_Preview">\begin{align}3+2\\\end{align}</div>
        <script type="math/tex; mode=display">\begin{align}3+2\\\end{align}</script>
        </div>
        ''',
        True
    )