diff --git a/bin/tape b/bin/tape
index ac6cfc1a..43cbb4cc 100755
--- a/bin/tape
+++ b/bin/tape
@@ -3,6 +3,7 @@
 'use strict';
 
 var parseOpts = require('minimist');
+var objectKeys = require('object-keys');
 
 var opts = parseOpts(process.argv.slice(2), {
     alias: { r: 'require', i: 'ignore' },
@@ -18,7 +19,7 @@ if (typeof opts.require === 'string') {
 
 var resolveModule;
 opts.require.forEach(function (module) {
-    var options = { basedir: cwd, extensions: Object.keys(require.extensions) };
+    var options = { basedir: cwd, extensions: objectKeys(require.extensions) };
     if (module) {
         if (!resolveModule) { resolveModule = require('resolve').sync; }
         // This check ensures we ignore `-r ""`, trailing `-r`, or other silly things the user might (inadvertently) be doing.
diff --git a/lib/test.js b/lib/test.js
index 3e567ffe..ced12081 100644
--- a/lib/test.js
+++ b/lib/test.js
@@ -12,6 +12,9 @@ var callBound = require('call-bind/callBound');
 var forEach = require('for-each');
 var inspect = require('object-inspect');
 var is = require('object-is');
+var objectKeys = require('object-keys');
+var every = require('array.prototype.every');
+
 var isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
 var toLowerCase = callBound('String.prototype.toLowerCase');
 var isProto = callBound('Object.prototype.isPrototypeOf');
@@ -654,14 +657,14 @@ Test.prototype['throws'] = function (fn, expected, msg, extra) {
             passed = expected.test(caught.error);
             expected = inspect(expected);
         } else if (expected && typeof expected === 'object') { // Handle validation objects.
-            var keys = Object.keys(expected);
+            var keys = objectKeys(expected);
             // Special handle errors to make sure the name and the message are compared as well.
             if (expected instanceof Error) {
                 $push(keys, 'name', 'message');
             } else if (keys.length === 0) {
                 throw new TypeError('`throws` validation object must not be empty');
             }
-            passed = keys.every(function (key) {
+            passed = every(keys, function (key) {
                 if (typeof caught.error[key] === 'string' && isRegExp(expected[key]) && $test(expected[key], caught.error[key])) {
                     return true;
                 }
diff --git a/package.json b/package.json
index 253e1023..adb49afb 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,7 @@
         "test": "test"
     },
     "dependencies": {
+        "array.prototype.every": "^1.1.3",
         "call-bind": "^1.0.2",
         "deep-equal": "^2.0.5",
         "defined": "^1.0.0",
@@ -39,6 +40,7 @@
         "minimist": "^1.2.5",
         "object-inspect": "^1.12.0",
         "object-is": "^1.1.5",
+        "object-keys": "^1.1.1",
         "object.assign": "^4.1.2",
         "resolve": "^2.0.0-next.3",
         "resumer": "^0.0.0",