Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class="selector">
  Hello World. Should be black
  
  <p class="test">
    This should be black.
  </p>
  
</div>

<div class="selector test">
  This should be red.
</div>

SassMeister-input.scss

// ----
// Sass (v3.4.3)
// Compass (v1.0.1)
// ----

.selector {
  color: black;
  
  &[class*="test"] {
    color: red;
  }
}

SassMeister-output.css

.selector {
  color: black;
}
.selector[class*="test"] {
  color: red;
}

SassMeister-rendered.html

<div class="selector">
  Hello World. Should be black
  
  <p class="test">
    This should be black.
  </p>
  
</div>

<div class="selector test">
  This should be red.
</div>