diff --git a/lighthouse-cli/test/fixtures/dobetterweb/dbw_tester.html b/lighthouse-cli/test/fixtures/dobetterweb/dbw_tester.html
index ab1808632a59..0f50e902298c 100644
--- a/lighthouse-cli/test/fixtures/dobetterweb/dbw_tester.html
+++ b/lighthouse-cli/test/fixtures/dobetterweb/dbw_tester.html
@@ -418,12 +418,14 @@ <h2>Do better web tester page</h2>
 }
 </script>
 
-<!-- PASS: not in header, so it does not block rendering. zone.js is loaded
-     by the static-server and provides a polyfill for Promise. -->
-<script src="/zone.js"></script>
+<!-- Including this script validates that driver.evaluateAsync() still works even with
+  window.Promise being mucked with. See file source for details.
+  Also, script is located down here to avoid being flagged in render-blocking-resources. -->
+<script src="./third_party/aggressive-promise-polyfill.js"></script>
+
 <!-- FAIL(is-on-https): requires a non-localhost http file
-     FAIL: Loads a vulnerable JS library
--->
+     FAIL(no-vulnerable-libraries): Loads a vulnerable JS library -->
 <script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
+
 </body>
 </html>
diff --git a/lighthouse-cli/test/fixtures/dobetterweb/third_party/aggressive-promise-polyfill.js b/lighthouse-cli/test/fixtures/dobetterweb/third_party/aggressive-promise-polyfill.js
new file mode 100644
index 000000000000..230e4dbdd2f8
--- /dev/null
+++ b/lighthouse-cli/test/fixtures/dobetterweb/third_party/aggressive-promise-polyfill.js
@@ -0,0 +1,13 @@
+
+/**
+ * Lighthouse backstory:
+ * Zone aggressively polyfills promises including rewriting Promise.prototype.then which caused
+ * problems for our evaluateAsync code where we rely on a window.__nativePromise to work.
+ * We serve this file in dbw_tester.html to make sure evaluateAsync, etc all works great
+ * Serving this file via node_modules was a pain so we've vendored it here.
+ * @see https://github.com/GoogleChrome/lighthouse/issues/1173
+ * @see https://github.com/GoogleChrome/lighthouse/pull/1178
+ */
+
+// vendored from zone.js@0.7.3
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t():"function"==typeof define&&define.amd?define(t):t()}(this,function(){"use strict";function e(e,t){for(var n=e.length-1;n>=0;n--)"function"==typeof e[n]&&(e[n]=Zone.current.wrap(e[n],t+"_"+n));return e}function t(t,n){for(var r=t.constructor.name,o=function(o){var a=n[o],i=t[a];i&&(t[a]=function(t){return function(){return t.apply(this,e(arguments,r+"."+a))}}(i))},a=0;a<n.length;a++)o(a)}function n(e,t){var n=Object.getOwnPropertyDescriptor(e,t)||{enumerable:!0,configurable:!0},r=Object.getOwnPropertyDescriptor(e,"original"+t);!r&&n.get&&Object.defineProperty(e,"original"+t,{enumerable:!1,configurable:!0,get:n.get}),delete n.writable,delete n.value;var o=t.substr(2),a="_"+t;n.set=function(e){if(this[a]&&this.removeEventListener(o,this[a]),"function"==typeof e){var t=function(t){var n;n=e.apply(this,arguments),void 0==n||n||t.preventDefault()};this[a]=t,this.addEventListener(o,t,!1)}else this[a]=null},n.get=function(){var r=this[a]||null;if(null===r){var o=Object.getOwnPropertyDescriptor(e,"original"+t);o&&o.get&&(r=o.get.apply(this,arguments),r&&(n.set.apply(this,[r]),this.removeAttribute(t)))}return this[a]||null},Object.defineProperty(e,t,n)}function r(e,t){var r=[];for(var o in e)"on"==o.substr(0,2)&&r.push(o);for(var a=0;a<r.length;a++)n(e,r[a]);if(t)for(var i=0;i<t.length;i++)n(e,"on"+t[i])}function o(e,t,n,r,o){var a=e[C];if(a)for(var i=0;i<a.length;i++){var s=a[i],u=s.data,c=u.handler;if((u.handler===t||c.listener===t)&&u.useCapturing===r&&u.eventName===n)return o&&a.splice(i,1),s}return null}function a(e,t,n){var r=e[C];r||(r=e[C]=[]),n?r.unshift(t):r.push(t)}function i(e,t,n,r,i,s){function u(e){var t=e.data;return a(t.target,e,i),t.invokeAddFunc(l,e)}function c(e){var t=e.data;return o(t.target,e.invoke,t.eventName,t.useCapturing,!0),t.invokeRemoveFunc(h,e)}void 0===n&&(n=!0),void 0===r&&(r=!1),void 0===i&&(i=!1),void 0===s&&(s=I);var l=E(e),h=E(t),p=!n&&void 0;return function(t,n){var a=s(t,n);a.useCapturing=a.useCapturing||p;var i=null;"function"==typeof a.handler?i=a.handler:a.handler&&a.handler.handleEvent&&(i=function(e){return a.handler.handleEvent(e)});var h=!1;try{h=a.handler&&"[object FunctionWrapper]"===a.handler.toString()}catch(f){return}if(!i||h)return a.invokeAddFunc(l,a.handler);if(!r){var d=o(a.target,a.handler,a.eventName,a.useCapturing,!1);if(d)return a.invokeAddFunc(l,d)}var k=Zone.current,v=a.target.constructor.name+"."+e+":"+a.eventName;k.scheduleEventTask(v,i,a,u,c)}}function s(e,t,n){void 0===t&&(t=!0),void 0===n&&(n=I);var r=E(e),a=!t&&void 0;return function(e,t){var i=n(e,t);i.useCapturing=i.useCapturing||a;var s=o(i.target,i.handler,i.eventName,i.useCapturing,!0);s?s.zone.cancelTask(s):i.invokeRemoveFunc(r,i.handler)}}function u(e,t,n,r){return void 0===t&&(t=z),void 0===n&&(n=j),void 0===r&&(r=I),!(!e||!e[t])&&(h(e,t,function(){return i(t,n,!0,!1,!1,r)}),h(e,n,function(){return s(n,!0,r)}),!0)}function c(t){var n=D[t];if(n){D[t]=function(){var r=e(arguments,t);switch(r.length){case 0:this[L]=new n;break;case 1:this[L]=new n(r[0]);break;case 2:this[L]=new n(r[0],r[1]);break;case 3:this[L]=new n(r[0],r[1],r[2]);break;case 4:this[L]=new n(r[0],r[1],r[2],r[3]);break;default:throw new Error("Arg list too long.")}};var r,o=new n(function(){});for(r in o)"XMLHttpRequest"===t&&"responseBlob"===r||!function(e){"function"==typeof o[e]?D[t].prototype[e]=function(){return this[L][e].apply(this[L],arguments)}:Object.defineProperty(D[t].prototype,e,{set:function(n){"function"==typeof n?this[L][e]=Zone.current.wrap(n,t+"."+e):this[L][e]=n},get:function(){return this[L][e]}})}(r);for(r in n)"prototype"!==r&&n.hasOwnProperty(r)&&(D[t][r]=n[r])}}function l(e,t){try{return Function("f","return function "+e+"(){return f(this, arguments)}")(t)}catch(n){return function(){return t(this,arguments)}}}function h(e,t,n){for(var r=e;r&&Object.getOwnPropertyNames(r).indexOf(t)===-1;)r=Object.getPrototypeOf(r);!r&&e[t]&&(r=e);var o,a=E(t);return r&&!(o=r[a])&&(o=r[a]=r[t],r[t]=l(t,n(o,a,t))),o}function p(e,t,n,r){function o(t){var n=t.data;return n.args[0]=function(){t.invoke.apply(this,arguments),delete u[n.handleId]},n.handleId=i.apply(e,n.args),u[n.handleId]=t,t}function a(e){return delete u[e.data.handleId],s(e.data.handleId)}var i=null,s=null;t+=r,n+=r;var u={};i=h(e,t,function(n){return function(i,s){if("function"==typeof s[0]){var u=Zone.current,c={handleId:null,isPeriodic:"Interval"===r,delay:"Timeout"===r||"Interval"===r?s[1]||0:null,args:s},l=u.scheduleMacroTask(t,s[0],c,o,a);if(!l)return l;var h=l.data.handleId;return h.ref&&h.unref&&(l.ref=h.ref.bind(h),l.unref=h.unref.bind(h)),l}return n.apply(e,s)}}),s=h(e,n,function(t){return function(n,r){var o="number"==typeof r[0]?u[r[0]]:r[0];o&&"string"==typeof o.type?(o.cancelFn&&o.data.isPeriodic||0===o.runCount)&&o.zone.cancelTask(o):t.apply(e,r)}})}function f(){Object.defineProperty=function(e,t,n){if(k(e,t))throw new TypeError("Cannot assign to read only property '"+t+"' of "+e);var r=n.configurable;return"prototype"!==t&&(n=v(e,t,n)),g(e,t,n,r)},Object.defineProperties=function(e,t){return Object.keys(t).forEach(function(n){Object.defineProperty(e,n,t[n])}),e},Object.create=function(e,t){return"object"!=typeof t||Object.isFrozen(t)||Object.keys(t).forEach(function(n){t[n]=v(e,n,t[n])}),H(e,t)},Object.getOwnPropertyDescriptor=function(e,t){var n=M(e,t);return k(e,t)&&(n.configurable=!1),n}}function d(e,t,n){var r=n.configurable;return n=v(e,t,n),g(e,t,n,r)}function k(e,t){return e&&e[R]&&e[R][t]}function v(e,t,n){return n.configurable=!0,n.configurable||(e[R]||F(e,R,{writable:!0,value:{}}),e[R][t]=!0),n}function g(e,t,n,r){try{return F(e,t,n)}catch(o){if(!n.configurable)throw o;"undefined"==typeof r?delete 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t,r,o=e.target;for(r=o?o.constructor.name+"."+n:"unknown."+n;o;)o[n]&&!o[n][W]&&(t=Zone.current.wrap(o[n],r),t[W]=o[n],o[n]=t),o=o.parentElement},!0)},t=0;t<A.length;t++)e(t)}function w(e){if(P&&"registerElement"in e.document){var t=document.registerElement,n=["createdCallback","attachedCallback","detachedCallback","attributeChangedCallback"];document.registerElement=function(e,r){return r&&r.prototype&&n.forEach(function(e){var t="Document.registerElement::"+e;if(r.prototype.hasOwnProperty(e)){var n=Object.getOwnPropertyDescriptor(r.prototype,e);n&&n.value?(n.value=Zone.current.wrap(n.value,t),d(r.prototype,e,n)):r.prototype[e]=Zone.current.wrap(r.prototype[e],t)}else r.prototype[e]&&(r.prototype[e]=Zone.current.wrap(r.prototype[e],t))}),t.apply(document,[e,r])}}}function S(e){function t(e){var t=e[J];return t}function n(e){self[$]=!1;var t=e.data,n=t.target[Y];n&&t.target.removeEventListener("readystatechange",n);var r=t.target[Y]=function(){t.target.readyState===t.target.DONE&&!t.aborted&&self[$]&&e.invoke()};t.target.addEventListener("readystatechange",r);var o=t.target[J];return o||(t.target[J]=e),i.apply(t.target,t.args),self[$]=!0,e}function r(){}function o(e){var t=e.data;return t.aborted=!0,s.apply(t.target,t.args)}var a=h(e.XMLHttpRequest.prototype,"open",function(){return function(e,t){return e[Q]=0==t[2],a.apply(e,t)}}),i=h(e.XMLHttpRequest.prototype,"send",function(){return function(e,t){var a=Zone.current;if(e[Q])return i.apply(e,t);var s={target:e,isPeriodic:!1,delay:null,args:t,aborted:!1};return a.scheduleMacroTask("XMLHttpRequest.send",r,s,n,o)}}),s=h(e.XMLHttpRequest.prototype,"abort",function(e){return function(e,n){var r=t(e);if(r&&"string"==typeof r.type){if(null==r.cancelFn)return;r.zone.cancelTask(r)}}})}var E=(function(e){function t(e){return"__zone_symbol__"+e}function n(){0===O&&0===S.length&&(e[b]?e[b].resolve(0)[T](a):e[m](a,0))}function r(e){n(),S.push(e)}function o(e){var t=e&&e.rejection;t&&console.error("Unhandled Promise rejection:",t instanceof Error?t.message:t,"; Zone:",e.zone.name,"; Task:",e.task&&e.task.source,"; Value:",t,t instanceof Error?t.stack:void 0),console.error(e)}function a(){if(!E){for(E=!0;S.length;){var e=S;S=[];for(var t=0;t<e.length;t++){var n=e[t];try{n.zone.runTask(n,null,null)}catch(r){o(r)}}}for(;D.length;)for(var a=function(){var e=D.shift();try{e.zone.runGuarded(function(){throw e})}catch(t){o(t)}};D.length;)a();E=!1}}function i(e){return e&&e.then}function s(e){return e}function u(e){return F.reject(e)}function c(e,t){return function(n){l(e,t,n)}}function l(e,t,r){if(e[Z]===z)if(r instanceof F&&r.hasOwnProperty(Z)&&r.hasOwnProperty(P)&&r[Z]!==z)h(r),l(e,r[Z],r[P]);else if(i(r))r.then(c(e,t),c(e,!1));else{e[Z]=t;var o=e[P];e[P]=r;for(var a=0;a<o.length;)p(e,o[a++],o[a++],o[a++],o[a++]);if(0==o.length&&t==I){e[Z]=L;try{throw new Error("Uncaught (in promise): "+r+(r&&r.stack?"\n"+r.stack:""))}catch(s){var 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loaded.");var k=function(){function n(e,t){this._properties=null,this._parent=e,this._name=t?t.name||"unnamed":"<root>",this._properties=t&&t.properties||{},this._zoneDelegate=new v(this,this._parent&&this._parent._zoneDelegate,t)}return n.assertZonePatched=function(){if(e.Promise!==F)throw new Error("Zone.js has detected that ZoneAwarePromise `(window|global).Promise` has been overwritten.\nMost likely cause is that a Promise polyfill has been loaded after Zone.js (Polyfilling Promise api is not necessary when zone.js is loaded. If you must load one, do so before loading zone.js.)")},Object.defineProperty(n,"current",{get:function(){return _.zone},enumerable:!0,configurable:!0}),Object.defineProperty(n,"currentTask",{get:function(){return w},enumerable:!0,configurable:!0}),Object.defineProperty(n.prototype,"parent",{get:function(){return this._parent},enumerable:!0,configurable:!0}),Object.defineProperty(n.prototype,"name",{get:function(){return this._name},enumerable:!0,configurable:!0}),n.prototype.get=function(e){var t=this.getZoneWith(e);if(t)return t._properties[e]},n.prototype.getZoneWith=function(e){for(var t=this;t;){if(t._properties.hasOwnProperty(e))return t;t=t._parent}return null},n.prototype.fork=function(e){if(!e)throw new Error("ZoneSpec required!");return this._zoneDelegate.fork(this,e)},n.prototype.wrap=function(e,t){if("function"!=typeof e)throw new Error("Expecting function got: "+e);var n=this._zoneDelegate.intercept(this,e,t),r=this;return function(){return r.runGuarded(n,this,arguments,t)}},n.prototype.run=function(e,t,n,r){void 0===t&&(t=null),void 0===n&&(n=null),void 0===r&&(r=null),_=new y(_,this);try{return this._zoneDelegate.invoke(this,e,t,n,r)}finally{_=_.parent}},n.prototype.runGuarded=function(e,t,n,r){void 0===t&&(t=null),void 0===n&&(n=null),void 0===r&&(r=null),_=new y(_,this);try{try{return this._zoneDelegate.invoke(this,e,t,n,r)}catch(o){if(this._zoneDelegate.handleError(this,o))throw o}}finally{_=_.parent}},n.prototype.runTask=function(e,t,n){if(e.runCount++,e.zone!=this)throw new Error("A task can only be run in the zone which created it! (Creation: "+e.zone.name+"; Execution: "+this.name+")");var r=w;w=e,_=new y(_,this);try{"macroTask"==e.type&&e.data&&!e.data.isPeriodic&&(e.cancelFn=null);try{return this._zoneDelegate.invokeTask(this,e,t,n)}catch(o){if(this._zoneDelegate.handleError(this,o))throw o}}finally{_=_.parent,w=r}},n.prototype.scheduleMicroTask=function(e,t,n,r){return this._zoneDelegate.scheduleTask(this,new g("microTask",this,e,t,n,r,null))},n.prototype.scheduleMacroTask=function(e,t,n,r,o){return this._zoneDelegate.scheduleTask(this,new g("macroTask",this,e,t,n,r,o))},n.prototype.scheduleEventTask=function(e,t,n,r,o){return this._zoneDelegate.scheduleTask(this,new g("eventTask",this,e,t,n,r,o))},n.prototype.cancelTask=function(e){var t=this._zoneDelegate.cancelTask(this,e);return e.runCount=-1,e.cancelFn=null,t},n.__symbol__=t,n}(),v=function(){function e(e,t,n){this._taskCounts={microTask:0,macroTask:0,eventTask:0},this.zone=e,this._parentDelegate=t,this._forkZS=n&&(n&&n.onFork?n:t._forkZS),this._forkDlgt=n&&(n.onFork?t:t._forkDlgt),this._forkCurrZone=n&&(n.onFork?this.zone:t.zone),this._interceptZS=n&&(n.onIntercept?n:t._interceptZS),this._interceptDlgt=n&&(n.onIntercept?t:t._interceptDlgt),this._interceptCurrZone=n&&(n.onIntercept?this.zone:t.zone),this._invokeZS=n&&(n.onInvoke?n:t._invokeZS),this._invokeDlgt=n&&(n.onInvoke?t:t._invokeDlgt),this._invokeCurrZone=n&&(n.onInvoke?this.zone:t.zone),this._handleErrorZS=n&&(n.onHandleError?n:t._handleErrorZS),this._handleErrorDlgt=n&&(n.onHandleError?t:t._handleErrorDlgt),this._handleErrorCurrZone=n&&(n.onHandleError?this.zone:t.zone),this._scheduleTaskZS=n&&(n.onScheduleTask?n:t._scheduleTaskZS),this._scheduleTaskDlgt=n&&(n.onScheduleTask?t:t._scheduleTaskDlgt),this._scheduleTaskCurrZone=n&&(n.onScheduleTask?this.zone:t.zone),this._invokeTaskZS=n&&(n.onInvokeTask?n:t._invokeTaskZS),this._invokeTaskDlgt=n&&(n.onInvokeTask?t:t._invokeTaskDlgt),this._invokeTaskCurrZone=n&&(n.onInvokeTask?this.zone:t.zone),this._cancelTaskZS=n&&(n.onCancelTask?n:t._cancelTaskZS),this._cancelTaskDlgt=n&&(n.onCancelTask?t:t._cancelTaskDlgt),this._cancelTaskCurrZone=n&&(n.onCancelTask?this.zone:t.zone),this._hasTaskZS=n&&(n.onHasTask?n:t._hasTaskZS),this._hasTaskDlgt=n&&(n.onHasTask?t:t._hasTaskDlgt),this._hasTaskCurrZone=n&&(n.onHasTask?this.zone:t.zone)}return e.prototype.fork=function(e,t){return this._forkZS?this._forkZS.onFork(this._forkDlgt,this.zone,e,t):new k(e,t)},e.prototype.intercept=function(e,t,n){return this._interceptZS?this._interceptZS.onIntercept(this._interceptDlgt,this._interceptCurrZone,e,t,n):t},e.prototype.invoke=function(e,t,n,r,o){return this._invokeZS?this._invokeZS.onInvoke(this._invokeDlgt,this._invokeCurrZone,e,t,n,r,o):t.apply(n,r)},e.prototype.handleError=function(e,t){return!this._handleErrorZS||this._handleErrorZS.onHandleError(this._handleErrorDlgt,this._handleErrorCurrZone,e,t)},e.prototype.scheduleTask=function(e,t){try{if(this._scheduleTaskZS)return this._scheduleTaskZS.onScheduleTask(this._scheduleTaskDlgt,this._scheduleTaskCurrZone,e,t);if(t.scheduleFn)t.scheduleFn(t);else{if("microTask"!=t.type)throw new Error("Task is missing scheduleFn.");r(t)}return t}finally{e==this.zone&&this._updateTaskCount(t.type,1)}},e.prototype.invokeTask=function(e,t,n,r){try{return this._invokeTaskZS?this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt,this._invokeTaskCurrZone,e,t,n,r):t.callback.apply(n,r)}finally{e!=this.zone||"eventTask"==t.type||t.data&&t.data.isPeriodic||this._updateTaskCount(t.type,-1)}},e.prototype.cancelTask=function(e,t){var n;if(this._cancelTaskZS)n=this._cancelTaskZS.onCancelTask(this._cancelTaskDlgt,this._cancelTaskCurrZone,e,t);else{if(!t.cancelFn)throw new Error("Task does not support cancellation, or is already canceled.");n=t.cancelFn(t)}return e==this.zone&&this._updateTaskCount(t.type,-1),n},e.prototype.hasTask=function(e,t){return this._hasTaskZS&&this._hasTaskZS.onHasTask(this._hasTaskDlgt,this._hasTaskCurrZone,e,t)},e.prototype._updateTaskCount=function(e,t){var n=this._taskCounts,r=n[e],o=n[e]=r+t;if(o<0)throw new Error("More tasks executed then were scheduled.");if(0==r||0==o){var a={microTask:n.microTask>0,macroTask:n.macroTask>0,eventTask:n.eventTask>0,change:e};try{this.hasTask(this.zone,a)}finally{this._parentDelegate&&this._parentDelegate._updateTaskCount(e,t)}}},e}(),g=function(){function e(e,t,n,r,o,i,s){this.runCount=0,this.type=e,this.zone=t,this.source=n,this.data=o,this.scheduleFn=i,this.cancelFn=s,this.callback=r;var u=this;this.invoke=function(){O++;try{return t.runTask(u,this,arguments)}finally{1==O&&a(),O--}}}return e.prototype.toString=function(){return this.data&&"undefined"!=typeof this.data.handleId?this.data.handleId:Object.prototype.toString.call(this)},e}(),y=function(){function e(e,t){this.parent=e,this.zone=t}return e}(),m=t("setTimeout"),b=t("Promise"),T=t("then"),_=new y(null,new k(null,null)),w=null,S=[],E=!1,D=[],O=0,Z=t("state"),P=t("value"),C="Promise.then",z=null,j=!0,I=!1,L=0,F=function(){function e(t){var n=this;if(!(n instanceof e))throw new Error("Must be an instanceof Promise.");n[Z]=z,n[P]=[];try{t&&t(c(n,j),c(n,I))}catch(r){l(n,!1,r)}}return e.resolve=function(e){return l(new this(null),j,e)},e.reject=function(e){return l(new this(null),I,e)},e.race=function(e){function t(e){a&&(a=r(e))}function n(e){a&&(a=o(e))}for(var r,o,a=new this(function(e,t){n=[e,t],r=n[0],o=n[1];var n}),s=0,u=e;s<u.length;s++){var c=u[s];i(c)||(c=this.resolve(c)),c.then(t,n)}return a},e.all=function(e){for(var t,n,r=new this(function(e,r){t=e,n=r}),o=0,a=[],s=0,u=e;s<u.length;s++){var c=u[s];i(c)||(c=this.resolve(c)),c.then(function(e){return function(n){a[e]=n,o--,o||t(a)}}(o),n),o++}return o||t(a),r},e.prototype.then=function(e,t){var n=new this.constructor(null),r=k.current;return this[Z]==z?this[P].push(r,n,e,t):p(this,r,n,e,t),n},e.prototype["catch"]=function(e){return this.then(null,e)},e}();F.resolve=F.resolve,F.reject=F.reject,F.race=F.race,F.all=F.all;var M=e[t("Promise")]=e.Promise;if(e.Promise=F,M&&(f(M),"undefined"!=typeof e.fetch)){var H=void 0;try{H=e.fetch()}catch(R){H=e.fetch("about:blank")}H.then(function(){return null},function(){return null}),H.constructor!=M&&H.constructor!=F&&f(H.constructor)}Promise[k.__symbol__("uncaughtPromiseErrors")]=D;var x;!function(e){e[e.blackList=0]="blackList",e[e.transition=1]="transition"}(x||(x={}));var q,B=e[t("Error")]=e.Error,A={};e.Error=d;var W="stackRewrite";d.prototype=Object.create(B.prototype),d[k.__symbol__("blacklistedStackFrames")]=A,d[W]=!1,B.hasOwnProperty("stackTraceLimit")&&(B.stackTraceLimit=Math.max(B.stackTraceLimit,15),Object.defineProperty(d,"stackTraceLimit",{get:function(){return B.stackTraceLimit},set:function(e){return B.stackTraceLimit=e}})),B.hasOwnProperty("captureStackTrace")&&Object.defineProperty(d,"captureStackTrace",{value:function(e,t){B.captureStackTrace(e,t)}}),Object.defineProperty(d,"prepareStackTrace",{get:function(){return B.prepareStackTrace},set:function(e){return B.prepareStackTrace=e}});var N=k.current.fork({name:"detect",onInvoke:function(e,t,n,r,o,a,i){return e.invoke(n,r,o,a,i)},onHandleError:function(e,t,n,r){if(r.originalStack&&Error===d)for(var o=r.originalStack.split(/\n/),a=!1,i=!1,s=!1;o.length;){var u=o.shift();if(/:\d+:\d+/.test(u)){var c=u.split("(")[0].split("@")[0],l=x.transition;if(c.indexOf("ZoneAwareError")!==-1&&(q=u),c.indexOf("runGuarded")!==-1?i=!0:c.indexOf("runTask")!==-1?s=!0:c.indexOf("run")!==-1?a=!0:l=x.blackList,A[u]=l,a&&i&&s){d[W]=!0;break}}}return!1}}),X=function(){N.run(function(){N.runGuarded(function(){throw new Error("blacklistStackFrames")})})};return N.runTask(N.scheduleMacroTask("detect",X,null,function(){return null},null)),e.Zone=k}("object"==typeof window&&window||"object"==typeof self&&self||global),function(e){return"__zone_symbol__"+e}),D="object"==typeof window&&window||"object"==typeof self&&self||global,O="undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope,Z=!("nw"in D)&&"undefined"!=typeof process&&"[object process]"==={}.toString.call(process),P=!Z&&!O&&!("undefined"==typeof window||!window.HTMLElement),C=E("eventTasks"),z="addEventListener",j="removeEventListener",I=function(e,t){return{useCapturing:t[2],eventName:t[0],handler:t[1],target:e||D,name:t[0],invokeAddFunc:function(e,t){return t&&t.invoke?this.target[e](this.eventName,t.invoke,this.useCapturing):this.target[e](this.eventName,t,this.useCapturing)},invokeRemoveFunc:function(e,t){return t&&t.invoke?this.target[e](this.eventName,t.invoke,this.useCapturing):this.target[e](this.eventName,t,this.useCapturing)}}},L=(i(z,j),s(j),E("originalInstance")),F=Object[E("defineProperty")]=Object.defineProperty,M=Object[E("getOwnPropertyDescriptor")]=Object.getOwnPropertyDescriptor,H=Object.create,R=E("unconfigurables"),x="Anchor,Area,Audio,BR,Base,BaseFont,Body,Button,Canvas,Content,DList,Directory,Div,Embed,FieldSet,Font,Form,Frame,FrameSet,HR,Head,Heading,Html,IFrame,Image,Input,Keygen,LI,Label,Legend,Link,Map,Marquee,Media,Menu,Meta,Meter,Mod,OList,Object,OptGroup,Option,Output,Paragraph,Pre,Progress,Quote,Script,Select,Source,Span,Style,TableCaption,TableCell,TableCol,Table,TableRow,TableSection,TextArea,Title,Track,UList,Unknown,Video",q="ApplicationCache,EventSource,FileReader,InputMethodContext,MediaController,MessagePort,Node,Performance,SVGElementInstance,SharedWorker,TextTrack,TextTrackCue,TextTrackList,WebKitNamedFlow,Window,Worker,WorkerGlobalScope,XMLHttpRequest,XMLHttpRequestEventTarget,XMLHttpRequestUpload,IDBRequest,IDBOpenDBRequest,IDBDatabase,IDBTransaction,IDBCursor,DBIndex,WebSocket".split(","),B="EventTarget",A="copy cut paste abort blur focus canplay canplaythrough change click contextmenu dblclick drag dragend dragenter dragleave dragover dragstart drop durationchange emptied ended input invalid keydown keypress keyup load loadeddata loadedmetadata loadstart message mousedown mouseenter mouseleave mousemove mouseout mouseover mouseup pause play playing progress ratechange reset scroll seeked seeking select show stalled submit suspend timeupdate volumechange waiting mozfullscreenchange mozfullscreenerror mozpointerlockchange mozpointerlockerror error webglcontextrestored webglcontextlost webglcontextcreationerror".split(" "),W=E("unbound"),N="set",X="clear",G=["alert","prompt","confirm"],U="object"==typeof window&&window||"object"==typeof self&&self||global;p(U,N,X,"Timeout"),p(U,N,X,"Interval"),p(U,N,X,"Immediate"),p(U,"request","cancel","AnimationFrame"),p(U,"mozRequest","mozCancel","AnimationFrame"),p(U,"webkitRequest","webkitCancel","AnimationFrame");for(var K=0;K<G.length;K++){var V=G[K];h(U,V,function(e,t,n){return function(t,r){return Zone.current.run(e,U,r,n)}})}y(U),b(U),c("MutationObserver"),c("WebKitMutationObserver"),c("FileReader"),f(),w(U),S(U);var J=E("xhrTask"),Q=E("xhrSync"),Y=E("xhrListener"),$=E("xhrScheduled");U.navigator&&U.navigator.geolocation&&t(U.navigator.geolocation,["getCurrentPosition","watchPosition"])});
diff --git a/lighthouse-cli/test/fixtures/static-server.js b/lighthouse-cli/test/fixtures/static-server.js
index ed35d9a151d9..17ea2e88cb19 100644
--- a/lighthouse-cli/test/fixtures/static-server.js
+++ b/lighthouse-cli/test/fixtures/static-server.js
@@ -47,19 +47,13 @@ function requestHandler(request, response) {
     absoluteFilePath = path.join(__dirname, '/../../../', filePath);
   }
 
-  if (filePath === '/zone.js') {
-    // evaluateAsync previously had a bug that LH would fail if a page polyfilled Promise.
-    // We bring in an aggressive Promise polyfill (zone) to ensure we don't still fail.
-    const zonePath = '../../../node_modules/zone.js';
-    absoluteFilePath = path.join(__dirname, `${zonePath}/dist/zone.js`);
-  } else {
-    // Otherwise, disallow file requests outside of LH folder
-    const filePathDir = path.parse(absoluteFilePath).dir;
-    if (!filePathDir.startsWith(lhRootDirPath)) {
-      return readFileCallback(new Error('Disallowed path'));
-    }
+  // Disallow file requests outside of LH folder
+  const filePathDir = path.parse(absoluteFilePath).dir;
+  if (!filePathDir.startsWith(lhRootDirPath)) {
+    return readFileCallback(new Error('Disallowed path'));
   }
 
+  // Check if the file exists, then read it and serve it.
   fs.exists(absoluteFilePath, fsExistsCallback);
 
   function fsExistsCallback(fileExists) {
diff --git a/package.json b/package.json
index 477d291c952b..086e0bfb5b7b 100644
--- a/package.json
+++ b/package.json
@@ -127,8 +127,7 @@
     "pretty-json-stringify": "^0.0.2",
     "puppeteer": "^1.19.0",
     "terser": "^4.2.0",
-    "typescript": "3.5.3",
-    "zone.js": "^0.7.3"
+    "typescript": "3.5.3"
   },
   "dependencies": {
     "axe-core": "3.3.0",
diff --git a/yarn.lock b/yarn.lock
index 38754c63ab88..b6c086ed2e5a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7974,8 +7974,3 @@ zip-stream@^2.0.1:
     archiver-utils "^2.0.0"
     compress-commons "^1.2.0"
     readable-stream "^2.0.0"
-
-zone.js@^0.7.3:
-  version "0.7.3"
-  resolved "https://registry.yarnpkg.com/zone.js/-/zone.js-0.7.3.tgz#d91432b6584f73c2c9e03ce4bb0870becc45d445"
-  integrity sha1-2RQytlhPc8LJ4DzkuwhwvsxF1EU=