diff --git a/test/test_jsonschema_draft4.rb b/test/test_jsonschema_draft4.rb
index <HASH>..<HASH> 100644
--- a/test/test_jsonschema_draft4.rb
+++ b/test/test_jsonschema_draft4.rb
@@ -907,6 +907,10 @@ class JSONSchemaDraft4Test < Test::Unit::TestCase
     assert(!JSON::Validator.validate(schema,data))
     data = {"a" => "2010-01-0112:00:00Z"}
     assert(!JSON::Validator.validate(schema,data))
+    data = {"a" => "2010-01-0112:00:00Z+0000"}
+    assert(!JSON::Validator.validate(schema,data))
+    data = {"a" => "2010-01-0112:00:00Z+00:00"}
+    assert(!JSON::Validator.validate(schema,data))
   end
Added tests in test_jsonschema_draft4 to test new regex