diff --git a/scm-core/src/test/java/sonia/scm/util/ValidationUtilTest.java b/scm-core/src/test/java/sonia/scm/util/ValidationUtilTest.java
index 620c2fae9d..d64cb37457 100644
--- a/scm-core/src/test/java/sonia/scm/util/ValidationUtilTest.java
+++ b/scm-core/src/test/java/sonia/scm/util/ValidationUtilTest.java
@@ -78,6 +78,9 @@ public class ValidationUtilTest
     assertTrue(ValidationUtil.isMailAddressValid("sdorra@ostfalia.de"));
     assertTrue(ValidationUtil.isMailAddressValid("s.sdorra@hbk-bs.de"));
     assertTrue(ValidationUtil.isMailAddressValid("s.sdorra@gmail.com"));
+    assertTrue(ValidationUtil.isMailAddressValid("s.sdorra@t.co"));
+    assertTrue(ValidationUtil.isMailAddressValid("s.sdorra@ucla.college")); 
+    assertTrue(ValidationUtil.isMailAddressValid("s.sdorra@example.xn--p1ai"));
 
     // false
     assertFalse(ValidationUtil.isMailAddressValid("ostfalia.de"));