1 files changed, 2 insertions, 1 deletions
diff --git a/test/parallel/test-util-format.js b/test/parallel/test-util-format.js
index a90e52946b..9d6b43a52d 100644
--- a/test/parallel/test-util-format.js
+++ b/test/parallel/test-util-format.js
@@ -308,7 +308,8 @@ function BadCustomError(msg) {
   Object.defineProperty(this, 'name',
                         { value: 'BadCustomError', enumerable: false });
 }
-util.inherits(BadCustomError, Error);
+Object.setPrototypeOf(BadCustomError.prototype, Error.prototype);
+Object.setPrototypeOf(BadCustomError, Error);
 assert.strictEqual(util.format(new BadCustomError('foo')),
                    '[BadCustomError: foo]');