--- a/testing/marionette/driver.js
+++ b/testing/marionette/driver.js
@@ -1781,17 +1781,26 @@ GeckoDriver.prototype.clickElement = fun
  */
 GeckoDriver.prototype.getElementAttribute = function*(cmd, resp) {
   let {id, name} = cmd.parameters;
 
   switch (this.context) {
     case Context.CHROME:
       let win = this.getCurrentWindow();
       let el = this.curBrowser.seenEls.get(id, {frame: win});
-      resp.body.value = atom.getElementAttribute(el, name, this.getCurrentWindow());
+
+      if (element.isBooleanAttribute(el, name)) {
+        if (el.hasAttribute(name)) {
+          resp.body.value = "true";
+        } else {
+          resp.body.value = null;
+        }
+      } else {
+        resp.body.value = el.getAttribute(name);
+      }
       break;
 
     case Context.CONTENT:
       resp.body.value = yield this.listener.getElementAttribute(id, name);
       break;
   }
 };