diff --git a/app/assets/javascripts/editor.js b/app/assets/javascripts/editor.js
index 9508f3b0..37649216 100644
--- a/app/assets/javascripts/editor.js
+++ b/app/assets/javascripts/editor.js
@@ -682,8 +682,8 @@ $(function() {
   };
 
   var isBrowserSupported = function() {
-    // todo event streams are no longer required with websockets
-    return window.EventSource !== undefined;
+    // eventsource tests for server send events (used for scoring), websockets is used for run
+    return Modernizr.eventsource && Modernizr.websockets;
   };
 
   var populatePanel = function(panel, result, index) {
diff --git a/app/assets/javascripts/modernizr-custom.js b/app/assets/javascripts/modernizr-custom.js
new file mode 100644
index 00000000..49e13429
--- /dev/null
+++ b/app/assets/javascripts/modernizr-custom.js
@@ -0,0 +1,3 @@
+/*! modernizr 3.1.0 (Custom Build) | MIT *
+ * http://modernizr.com/download/?-eventsource-websockets !*/
+!function(e,n,s){function o(e,n){return typeof e===n}function a(e){var n=l.className,s=Modernizr._config.classPrefix||"";if(f&&(n=n.baseVal),Modernizr._config.enableJSClass){var o=new RegExp("(^|\\s)"+s+"no-js(\\s|$)");n=n.replace(o,"$1"+s+"js$2")}Modernizr._config.enableClasses&&(n+=" "+s+e.join(" "+s),f?l.className.baseVal=n:l.className=n)}function t(){var e,n,s,a,t,l,f;for(var r in c){if(e=[],n=c[r],n.name&&(e.push(n.name.toLowerCase()),n.options&&n.options.aliases&&n.options.aliases.length))for(s=0;s<n.options.aliases.length;s++)e.push(n.options.aliases[s].toLowerCase());for(a=o(n.fn,"function")?n.fn():n.fn,t=0;t<e.length;t++)l=e[t],f=l.split("."),1===f.length?Modernizr[f[0]]=a:(!Modernizr[f[0]]||Modernizr[f[0]]instanceof Boolean||(Modernizr[f[0]]=new Boolean(Modernizr[f[0]])),Modernizr[f[0]][f[1]]=a),i.push((a?"":"no-")+f.join("-"))}}var i=[],l=n.documentElement,f="svg"===l.nodeName.toLowerCase(),c=[],r={_version:"3.1.0",_config:{classPrefix:"",enableClasses:!0,enableJSClass:!0,usePrefixes:!0},_q:[],on:function(e,n){var s=this;setTimeout(function(){n(s[e])},0)},addTest:function(e,n,s){c.push({name:e,fn:n,options:s})},addAsyncTest:function(e){c.push({name:null,fn:e})}},Modernizr=function(){};Modernizr.prototype=r,Modernizr=new Modernizr,Modernizr.addTest("websockets","WebSocket"in e&&2===e.WebSocket.CLOSING),Modernizr.addTest("eventsource","EventSource"in e),t(),a(i),delete r.addTest,delete r.addAsyncTest;for(var u=0;u<Modernizr._q.length;u++)Modernizr._q[u]();e.Modernizr=Modernizr}(window,document);
\ No newline at end of file