jsdom: querySelector within a fragment doesn't return SVG elements

Basic info:

• Node.js version: 6.11.2
• jsdom version: 11.2.0

Minimal reproduction case

var {JSDOM} = require("jsdom")
var frag = JSDOM.fragment(`<svg></svg>`);
console.log(frag.querySelector("svg"));
console.log(frag.querySelector("*"));

frag.querySelector("svg") returns null, while the wildcard selector correctly returns the SVG element.