diff --git a/src/Mailto.php b/src/Mailto.php
index 2164766..334548d 100644
--- a/src/Mailto.php
+++ b/src/Mailto.php
@@ -1,5 +1,5 @@
 <?php namespace Locker\XApi;
 
 class Mailto extends RegexpAtom {
-  protected static $pattern = '/^mailto:[A-Z0-9.\'_%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i';
+  protected static $pattern = '/^mailto:[A-Z0-9.\'_%+-]+@[A-Z0-9.-]+\.[A-Z]{1,63}$/i';
 }
diff --git a/tests/assets/test.json b/tests/assets/test.json
index 07e9051..119cf0b 100644
--- a/tests/assets/test.json
+++ b/tests/assets/test.json
@@ -1,12 +1,6 @@
 {
     "actor": {
-        "objectType": "Group",
-        "account": {
-            "homePage": "http://myaccount.bmj.com",
-            "name": "hrl"
-        },
-        "member": [
-        ]
+        "mbox": "mailto:x@y.horse"
     },
     "verb": {
         "id": "http:\/\/adlnet.gov\/expapi\/verbs\/completed",