diff --git a/rtd_phosphonetx/sourceTest/java/ch/systemsx/cisd/openbis/plugin/proteomics/server/PhosphoNetXServerTest.java b/rtd_phosphonetx/sourceTest/java/ch/systemsx/cisd/openbis/plugin/proteomics/server/PhosphoNetXServerTest.java
index 57f95107e7b8fec483cf46d5b9ce27dd165280d9..211c57809a79a694d3d3cd5f15ec8bbf500986bc 100644
--- a/rtd_phosphonetx/sourceTest/java/ch/systemsx/cisd/openbis/plugin/proteomics/server/PhosphoNetXServerTest.java
+++ b/rtd_phosphonetx/sourceTest/java/ch/systemsx/cisd/openbis/plugin/proteomics/server/PhosphoNetXServerTest.java
@@ -23,6 +23,7 @@ import org.jmock.Expectations;
 import org.testng.annotations.BeforeMethod;
 import org.testng.annotations.Test;
 
+import ch.rinn.restrictions.Friend;
 import ch.systemsx.cisd.openbis.common.eodsql.MockDataSet;
 import ch.systemsx.cisd.openbis.generic.server.plugin.IDataSetTypeSlaveServerPlugin;
 import ch.systemsx.cisd.openbis.generic.server.plugin.ISampleTypeSlaveServerPlugin;
@@ -46,6 +47,7 @@ import ch.systemsx.cisd.openbis.plugin.proteomics.shared.basic.dto.ProteinRelate
  *
  * @author Franz-Josef Elmer
  */
+@Friend(toClasses = PhosphoNetXServer.class)
 public class PhosphoNetXServerTest extends AbstractServerTestCase
 {
     private static final TechId EXPERIMENT_ID = new TechId(42L);