diff --git a/lib/reporters/browser.js b/lib/reporters/browser.js
index 9836c90c9..d43213fe3 100644
--- a/lib/reporters/browser.js
+++ b/lib/reporters/browser.js
@@ -54,6 +54,12 @@ exports.run = function (modules, options) {
         return el;
     };
 
+    function HTMLEscape(str) {
+	return str.replace(/&/g, '&')
+	    .replace(/</g, '&lt;')
+	    .replace(/>/g, '&gt;');
+    };
+
     var header = getOrCreate('h1', 'nodeunit-header');
     var banner = getOrCreate('h2', 'nodeunit-banner');
     var userAgent = getOrCreate('h2', 'nodeunit-userAgent');
@@ -92,7 +98,7 @@ exports.run = function (modules, options) {
                 var a = assertions[i];
                 if (a.failed()) {
                     li.innerHTML = (a.message || a.method || 'no message') +
-                        '<pre>' + (a.error.stack || a.error) + '</pre>';
+                        '<pre>' + HTMLEscape(a.error.stack || a.error) + '</pre>';
                     li.className = 'fail';
                 }
                 else {