diff --git a/lib/test.js b/lib/test.js
index 69f14fcf..31386f89 100644
--- a/lib/test.js
+++ b/lib/test.js
@@ -202,11 +202,11 @@ Test.prototype._assert = function assert(ok, opts) {
     var self = this;
     var extra = opts.extra || {};
 
-    ok = Boolean(ok) || Boolean(extra.skip);
+    ok = !!ok || !!extra.skip;
 
     var res = {
         id: self.assertCount++,
-        ok: Boolean(ok),
+        ok: ok,
         skip: defined(extra.skip, opts.skip),
         todo: defined(extra.todo, opts.todo, self._todo),
         name: defined(extra.message, opts.message, '(unnamed assert)'),
@@ -219,7 +219,7 @@ Test.prototype._assert = function assert(ok, opts) {
     if (has(opts, 'expected') || has(extra, 'expected')) {
         res.expected = defined(extra.expected, opts.expected);
     }
-    this._ok = Boolean(this._ok && ok);
+    this._ok = !!(this._ok && ok);
 
     if (!ok && !res.todo) {
         res.error = defined(extra.error, opts.error, new Error(res.name));