diff --git a/screening/sourceTest/java/ch/systemsx/cisd/openbis/plugin/screening/server/logic/WellContentLoaderTest.java b/screening/sourceTest/java/ch/systemsx/cisd/openbis/plugin/screening/server/logic/WellContentLoaderTest.java
index b1fe8b4c95465c246d57ced125d8eb86e855ff0d..d8ea3ca5ccee6279c4c21653d60e82c11ed752b0 100644
--- a/screening/sourceTest/java/ch/systemsx/cisd/openbis/plugin/screening/server/logic/WellContentLoaderTest.java
+++ b/screening/sourceTest/java/ch/systemsx/cisd/openbis/plugin/screening/server/logic/WellContentLoaderTest.java
@@ -57,7 +57,7 @@ public class WellContentLoaderTest extends AbstractScreeningDAOTest
     public void testLoadWellContentsWithProperties()
     {
         String[] materialCodes = new String[]
-            { "*" };
+            { "19*" };
         String[] materialTypeCodes =
             { "SIRNA" };