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<h1>1.6. Test configuration<a class="headerlink" href="#test-configuration" title="Permalink to this headline"></a></h1>
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<h2>1.6.1. test options and values<a class="headerlink" href="#test-options-and-values" title="Permalink to this headline"></a></h2>
<p>You can see all available command line options by running:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">py</span><span class="o">.</span><span class="n">test</span> <span class="o">-</span><span class="n">h</span>
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<p>py.test will lookup values of options in this order:</p>
<ul class="simple">
<li>option value supplied at command line</li>
<li>content of environment variable <tt class="docutils literal"><span class="pre">PYTEST_OPTION_NAME=...</span></tt></li>
<li><tt class="docutils literal"><span class="pre">name</span> <span class="pre">=</span> <span class="pre">...</span></tt> setting in the nearest <tt class="docutils literal"><span class="pre">conftest.py</span></tt> file.</li>
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<p>The name of an option usually is the one you find
in the longform of the option, i.e. the name
behind the <tt class="docutils literal"><span class="pre">--</span></tt> double-dash.</p>
<p>IOW, you can set default values for options per project, per
home-directoray, per shell session or per test-run.</p>
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