<svg> must have accessible text. Set aria-label, or aria-labelledby, or nest a <title> element.
However, if the <svg> is purely decorative, hide it with `aria-hidden='true'.
<!-- incorrect -->
<svg height='100' width='100'>
<circle cx='50' cy='50' r='40' stroke='black' stroke-width='3' fill='red'/>
</svg><!-- correct -->
<svg aria-label='A circle' height='100' width='100'>
<circle cx='50' cy='50' r='40' stroke='black' stroke-width='3' fill='red'/>
</svg>
<!-- correct -->
<svg aria-labelledby='test_id' height='100' width='100'>
<circle cx='50' cy='50' r='40' stroke='black' stroke-width='3' fill='red'/>
</svg>
<!-- correct -->
<svg height='100' width='100'>
<title>A circle</title>
<circle cx='50' cy='50' r='40' stroke='black' stroke-width='3' fill='red'/>
</svg>