lets try this

package.json

@@ -54,6 +54,7 @@
     "build/*"
   ],
   "jest": {
+    "testEnvironment": "jsdom",
     "testTimeout": 30000,
     "modulePaths": [
       "node_modules",

tests/html/safeHTML.test.js

@@ -1,6 +1,3 @@
-import jsdomGlobal from 'jsdom-global';
-jsdomGlobal();
-
 import { safeHTML } from '../../client/homebrew/brewRenderer/safeHTML';
 
 test('Exit if no document', function() {