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<div class="section" id="backwards-compatibility-policy">
<span id="backwards-compatibility"></span><h1>Backwards Compatibility Policy<a class="headerlink" href="#backwards-compatibility-policy" title="Permalink to this headline">¶</a></h1>
<p>Keeping backwards compatibility has a very high priority in the pytest project. Although we have deprecated functionality over the years, most of it is still supported. All deprecations in pytest were done because simpler or more efficient ways of accomplishing the same tasks have emerged, making the old way of doing things unnecessary.</p>
<p>With the pytest 3.0 release we introduced a clear communication scheme for when we will actually remove the old busted joint and politely ask you to use the new hotness instead, while giving you enough time to adjust your tests or raise concerns if there are valid reasons to keep deprecated functionality around.</p>
<p>To communicate changes we are already issuing deprecation warnings, but they are not displayed by default. In pytest 3.0 we changed the default setting so that pytest deprecation warnings are displayed if not explicitly silenced (with <code class="docutils literal"><span class="pre">--disable-pytest-warnings</span></code>).</p>
<p>We will only remove deprecated functionality in major releases (e.g. if we deprecate something in 3.0 we will remove it in 4.0), and keep it around for at least two minor releases (e.g. if we deprecate something in 3.9 and 4.0 is the next release, we will not remove it in 4.0 but in 5.0).</p>
<div class="section" id="deprecation-roadmap">
<h2>Deprecation Roadmap<a class="headerlink" href="#deprecation-roadmap" title="Permalink to this headline">¶</a></h2>
<p>This page lists deprecated features and when we plan to remove them. It is important to list the feature, the version where it got deprecated and the version we plan to remove it.</p>
<p>Following our deprecation policy, we should aim to keep features for <em>at least</em> two minor versions after it was considered deprecated.</p>
<div class="section" id="future-releases">
<h3>Future Releases<a class="headerlink" href="#future-releases" title="Permalink to this headline">¶</a></h3>
<div class="section" id="id1">
<h4>3.4<a class="headerlink" href="#id1" title="Permalink to this headline">¶</a></h4>
<p><strong>Old style classes</strong></p>
<p>Issue: <a class="reference external" href="https://github.com/pytest-dev/pytest/issues/2147">#2147</a>.</p>
<p>Deprecated in <code class="docutils literal"><span class="pre">3.2</span></code>.</p>
</div>
<div class="section" id="id3">
<h4>4.0<a class="headerlink" href="#id3" title="Permalink to this headline">¶</a></h4>
<p><strong>Yield tests</strong></p>
<p>Deprecated in <code class="docutils literal"><span class="pre">3.0</span></code>.</p>
<p><strong>pytest-namespace hook</strong></p>
<p>deprecated in <code class="docutils literal"><span class="pre">3.2</span></code>.</p>
<p><strong>Marks in parameter sets</strong></p>
<p>Deprecated in <code class="docutils literal"><span class="pre">3.2</span></code>.</p>
<p><strong>--result-log</strong></p>
<p>Deprecated in <code class="docutils literal"><span class="pre">3.0</span></code>.</p>
<p>See <a class="reference external" href="https://github.com/pytest-dev/pytest/issues/830">#830</a> for more information. Suggested alternative: <a class="reference external" href="https://pypi.python.org/pypi/pytest-tap">pytest-tap</a>.</p>
<p><strong>metafunc.addcall</strong></p>
<p>Issue: <a class="reference external" href="https://github.com/pytest-dev/pytest/issues/2876">#2876</a>.</p>
<p>Deprecated in <code class="docutils literal"><span class="pre">3.3</span></code>.</p>
<p><strong>pytest_plugins in non-toplevel conftests</strong></p>
<p>There is a deep conceptual confusion as <code class="docutils literal"><span class="pre">conftest.py</span></code> files themselves are activated/deactivated based on path, but the plugins they depend on aren't.</p>
<p>Issue: <a class="reference external" href="https://github.com/pytest-dev/pytest/issues/2639">#2639</a>.</p>
<p>Not yet officially deprecated.</p>
<p><strong>passing a single string to pytest.main()</strong></p>
<p>Pass a list of strings to <code class="docutils literal"><span class="pre">pytest.main()</span></code> instead.</p>
<p>Deprecated in <code class="docutils literal"><span class="pre">3.1</span></code>.</p>
<p><strong>[pytest] section in setup.cfg</strong></p>
<p>Use <code class="docutils literal"><span class="pre">[tool:pytest]</span></code> instead for compatibility with other tools.</p>
<p>Deprecated in <code class="docutils literal"><span class="pre">3.0</span></code>.</p>
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<div class="section" id="past-releases">
<h3>Past Releases<a class="headerlink" href="#past-releases" title="Permalink to this headline">¶</a></h3>
<div class="section" id="id7">
<h4>3.0<a class="headerlink" href="#id7" title="Permalink to this headline">¶</a></h4>
<ul class="simple">
<li>The following deprecated commandline options were removed:<ul>
<li><code class="docutils literal"><span class="pre">--genscript</span></code>: no longer supported;</li>
<li><code class="docutils literal"><span class="pre">--no-assert</span></code>: use <code class="docutils literal"><span class="pre">--assert=plain</span></code> instead;</li>
<li><code class="docutils literal"><span class="pre">--nomagic</span></code>: use <code class="docutils literal"><span class="pre">--assert=plain</span></code> instead;</li>
<li><code class="docutils literal"><span class="pre">--report</span></code>: use <code class="docutils literal"><span class="pre">-r</span></code> instead;</li>
</ul>
</li>
<li>Removed all <code class="docutils literal"><span class="pre">py.test-X*</span></code> entry points. The versioned, suffixed entry points
were never documented and a leftover from a pre-virtualenv era. These entry
points also created broken entry points in wheels, so removing them also
removes a source of confusion for users.</li>
</ul>
</div>
<div class="section" id="id8">
<h4>3.3<a class="headerlink" href="#id8" title="Permalink to this headline">¶</a></h4>
<ul class="simple">
<li>Dropped support for EOL Python 2.6 and 3.3.</li>
</ul>
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<li><a class="reference internal" href="#">Backwards Compatibility Policy</a><ul>
<li><a class="reference internal" href="#deprecation-roadmap">Deprecation Roadmap</a><ul>
<li><a class="reference internal" href="#future-releases">Future Releases</a><ul>
<li><a class="reference internal" href="#id1">3.4</a></li>
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