diff --git a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/PersonDAOTest.java b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/PersonDAOTest.java
index 18c36b9c532634425da28ea1216888beee7d1c8d..da9ac3ad99db9a6ad014a06708e012ba7f08e435 100644
--- a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/PersonDAOTest.java
+++ b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/PersonDAOTest.java
@@ -24,6 +24,7 @@ import static org.testng.AssertJUnit.fail;
 
 import java.util.List;
 
+import org.apache.commons.lang.StringUtils;
 import org.springframework.dao.DataAccessException;
 import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.test.annotation.NotTransactional;
@@ -100,7 +101,7 @@ public final class PersonDAOTest extends AbstractDAOTest
     {
         final IPersonDAO personDAO = daoFactory.getPersonDAO();
         final PersonPE testPerson = createPerson();
-        testPerson.setUserId(EXCEED_40_CHARACTERS);
+        testPerson.setUserId(StringUtils.repeat("A", 51));
         // User id too long
         try
         {