diff --git a/tests/test.util.js b/tests/test.util.js
index bce475da..60cdb582 100644
--- a/tests/test.util.js
+++ b/tests/test.util.js
@@ -63,7 +63,19 @@ describe('Utils', function() {
             // environments, so we need to redefine it whilst running these
             // tests.
             origNavigator = Object.getOwnPropertyDescriptor(window, "navigator");
+            if (origNavigator === undefined) {
+                // Object.getOwnPropertyDescriptor() doesn't work
+                // properly in any version of IE
+                this.skip();
+            }
+
             Object.defineProperty(window, "navigator", {value: {}});
+            if (window.navigator.languages !== undefined) {
+                // Object.defineProperty() doesn't work properly in old
+                // versions of Chrome
+                this.skip();
+            }
+
             window.navigator.languages = [];
         });
         afterEach(function () {