diff --git a/tests/JsonSchema/Tests/Constraints/FormatTest.php b/tests/JsonSchema/Tests/Constraints/FormatTest.php
index eb47983d..0f3f31a4 100644
--- a/tests/JsonSchema/Tests/Constraints/FormatTest.php
+++ b/tests/JsonSchema/Tests/Constraints/FormatTest.php
@@ -81,6 +81,7 @@ public function getValidFormats()
             array('2000-05-01T12:12:12+01:00', 'date-time'),
             array('2000-05-01T12:12:12.123456Z', 'date-time'),
             array('2000-05-01T12:12:12.123Z', 'date-time'),
+            array('2000-05-01T12:12:12.000Z', 'date-time'),
 
             array('0', 'utc-millisec'),