6..5.x - test_markdown is failing

[echarles]

FAILED notebook/tests/selenium/test_markdown.py::test_markdown_cell - assert ['<h1 id="Foo.../code></pre>'] == ['<h1 id="Foo.../code></pre>']
  At index 3 diff: '<pre><code>x = 1\n</code></pre>' != '<pre><code>x = 1</code></pre>'
  Full diff:
    [
     '<h1 id="Foo">Foo<a class="anchor-link" href="#Foo">¶</a></h1>',
     '<p><strong>Bar</strong></p>',
     '<p><em>Baz</em></p>',
  -  '<pre><code>x = 1</code></pre>',
  +  '<pre><code>x = 1\n'
  +  '</code></pre>',
  -  '<pre><code class="cm-s-ipython language-aaaa">x = 1</code></pre>',
  ?                                                      ^^^^^^^^^^^^^ -
  +  '<pre><code class="cm-s-ipython language-aaaa">x = 1\n'
  ?                                                      ^^
  +  '</code></pre>',
     '<pre><code class="cm-s-ipython language-python"><span '
     'class="cm-variable">s</span> <span class="cm-operator">=</span> <span '
     'class="cm-string">"$"</span>\n'
     '<span class="cm-variable">t</span> <span class="cm-operator">=</span> <span '
  -  'class="cm-string">"$"</span></code></pre>',
  ?                               ^^^^^^^^^^^^^ -
  +  'class="cm-string">"$"</span>\n'
  ?                               ^^
  +  '</code></pre>',
    ]