title: pytest doesn't find the test
body: <p>I try to make a simple test with assert statement like this</p>
  
  <pre><code>def sqr(x):
      return x**2 + 1 
  
  def test_sqr():
      assert kvadrat(2) == 4
  
  ! pytest
  </code></pre>
  
  <p>and it returns</p>
  
  <p><a href="https://i.stack.imgur.com/btqrr.png" rel="noreferrer"><img src="https://i.stack.imgur.com/btqrr.png" alt="enter image description here"></a></p>
  
  <p>If anyone has any ideas what might be wrong.</p>