diff --git a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/shared/api/v1/dto/DataSetTypeTest.java b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/shared/api/v1/dto/DataSetTypeTest.java
index b19de1188d3d63b8e19eb840b23c747f1c5b92e9..51ede5e49fef1ac32eeadce0285fbabe79f92d9f 100644
--- a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/shared/api/v1/dto/DataSetTypeTest.java
+++ b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/generic/shared/api/v1/dto/DataSetTypeTest.java
@@ -109,7 +109,7 @@ public class DataSetTypeTest extends AssertJUnit
     {
         String stringRepresentation = dataSetType.toString();
         assertEquals(
-                "DataSetType[dataSet-type,[PropertyType[PROP1,Property 1,<null>], PropertyType[PROP2,Property 2,Property 2 Description]]]",
+                "DataSetType[dataSet-type,[PropertyTypeGroup[<null>,[PropertyType[PROP1,Property 1,<null>], PropertyType[PROP2,Property 2,Property 2 Description]]]]]",
                 stringRepresentation);
     }
 }