diff --git a/lib/assert.js b/lib/assert.js
index 0b4c74aeb..3e0cb7037 100644
--- a/lib/assert.js
+++ b/lib/assert.js
@@ -215,7 +215,7 @@ function assertExpectations({assertion, actual, expectations, message, prefix, s
 		});
 	}
 
-	if (actual.code !== expectations.code) {
+	if (typeof expectations.code !== 'undefined' && actual.code !== expectations.code) {
 		throw new AssertionError({
 			assertion,
 			message,