diff --git a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/jython/JythonBasedAggregationServiceReportingPluginTest.java b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/jython/JythonBasedAggregationServiceReportingPluginTest.java
index 492ab1853fb9b83d2426bf1a44f60ac66d18e943..9a0f454556525a74083c5c060ece6effe502f4ea 100644
--- a/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/jython/JythonBasedAggregationServiceReportingPluginTest.java
+++ b/datastore_server/sourceTest/java/ch/systemsx/cisd/openbis/dss/generic/server/plugins/jython/JythonBasedAggregationServiceReportingPluginTest.java
@@ -172,8 +172,8 @@ public class JythonBasedAggregationServiceReportingPluginTest extends AbstractFi
                     + "java.lang.IllegalArgumentException: Invalid", ex.getMessage());
             String message = ex.getCause().getMessage();
             String prefix =
-                    "Error occured in line 28 of the script when evaluating 'aggregate({}, ";
-            assertEquals("Message '" + message + "' doesn't starts with '" + prefix + "'.", true,
+                    "Error occurred in line 28 of the script when evaluating 'aggregate({}, ";
+            assertTrue("Message '" + message + "' doesn't starts with '" + prefix + "'.", 
                     message.startsWith(prefix));
         }