diff --git a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/systemtest/plugin/generic/EntityValidationTest.java b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/systemtest/plugin/generic/EntityValidationTest.java
index e30e540d2f02052530017f5a84c277ebd2522520..6b46cbfa04cdd77ad8df1858443043d4fe9968fd 100644
--- a/openbis/sourceTest/java/ch/systemsx/cisd/openbis/systemtest/plugin/generic/EntityValidationTest.java
+++ b/openbis/sourceTest/java/ch/systemsx/cisd/openbis/systemtest/plugin/generic/EntityValidationTest.java
@@ -38,6 +38,7 @@ import ch.systemsx.cisd.openbis.generic.shared.basic.dto.NewAttachment;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.NewSample;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.Sample;
 import ch.systemsx.cisd.openbis.generic.shared.basic.dto.SampleType;
+import ch.systemsx.cisd.openbis.generic.shared.basic.dto.Script;
 import ch.systemsx.cisd.openbis.generic.shared.dto.SampleUpdatesDTO;
 import ch.systemsx.cisd.openbis.generic.shared.dto.identifier.ExperimentIdentifier;
 import ch.systemsx.cisd.openbis.generic.shared.dto.identifier.SampleIdentifier;
@@ -52,12 +53,13 @@ import ch.systemsx.cisd.openbis.generic.shared.dto.identifier.SampleIdentifierFa
 @Transactional(propagation = Propagation.NOT_SUPPORTED)
 public class EntityValidationTest extends GenericSystemTestCase
 {
-    // create sample of a type, that has attached script that forbids creation
 
     private static final String IMPOSSIBLE_TYPE = "IMPOSSIBLE";
 
     private static final String IMPOSSIBLE_TO_UPDATE_TYPE = "IMPOSSIBLE_TO_UPDATE";
 
+    private static final int TEST_SCRIPT_ID = 8;
+
     /**
      * shortcut for registerNewSample(identifier, type, null)
      */
@@ -145,6 +147,7 @@ public class EntityValidationTest extends GenericSystemTestCase
     @Test
     public void testSampleUpdateTriggerValidationOfParentsChildren()
     {
+        updateTestScript("  for childRelation in entity.entityPE().getChildRelationships():\n    requestValidation(childRelation.getChildSample()) ");
         // setting the parent of this sample, forces the validation of parent (as it is aslo being
         // changed)
         // as the consequence validation of INVALID sample is forced - via the validation script of
@@ -165,6 +168,27 @@ public class EntityValidationTest extends GenericSystemTestCase
         }
     }
 
+    @Test
+    public void testSampleUpdateTriggerValidationOfParentsChildrenDoesNotHappen()
+    {
+        updateTestScript("  pass");
+
+        Sample sample = getSampleFromSpaceAndType("TEST-SPACE", "WELL", "EV-NOT_INVALID");
+
+        SampleUpdatesDTO update = createSampleUpdates(sample, "EV-PARENT");
+
+        etlService.updateSample(systemSessionToken, update);
+    }
+
+    // this updates the script that validates the EV-PARENT sample
+    private void updateTestScript(String validationFunctionBody)
+    {
+        Script script = commonServer.getScriptInfo(systemSessionToken, new TechId(TEST_SCRIPT_ID));
+
+        script.setScript("def validate(entity, isNew):\n" + validationFunctionBody + "\n");
+        commonServer.updateScript(systemSessionToken, script);
+    }
+
     private SampleUpdatesDTO createSampleUpdates(Sample sample, String parentCode)
     {
         String[] modifiedParentCodesOrNull = new String[]
diff --git a/openbis/sourceTest/sql/postgresql/119/055=sample_types.tsv b/openbis/sourceTest/sql/postgresql/119/055=sample_types.tsv
index f1933faa232d4790a95a09888bda5780eb9e71d9..072a330ba6dfe0dd9a8cecfab8f410afb06fcf4a 100644
--- a/openbis/sourceTest/sql/postgresql/119/055=sample_types.tsv
+++ b/openbis/sourceTest/sql/postgresql/119/055=sample_types.tsv
@@ -7,4 +7,4 @@
 7	DYNAMIC_PLATE	Dynamic Plate	1	t	1	0	2009-03-23 15:34:44.462776+01	f	S	f	f	5	f
 8	IMPOSSIBLE	Impossible to create	1	t	1	0	2009-03-23 15:34:44.462776+01	f	S	f	f	6	f
 9	IMPOSSIBLE_TO_UPDATE	Impossible to update	1	t	1	0	2009-03-23 15:34:44.462776+01	f	S	f	f	7	f
-10	REQUIRE_CHILD_VALIDATION	Revalidated the child	1	t	1	0	2009-03-23 15:34:44.462776+01	f	S	f	f	8	f
\ No newline at end of file
+10	TEST_VALIDATION	Update validation script before validating	1	t	1	0	2009-03-23 15:34:44.462776+01	f	S	f	f	8	f
\ No newline at end of file
diff --git a/openbis/sourceTest/sql/postgresql/119/057=scripts.tsv b/openbis/sourceTest/sql/postgresql/119/057=scripts.tsv
index 513dfcadc420ceeecb751837a6246c607b66a1d0..b4a507230680c00144072e000174341a38cef781 100644
--- a/openbis/sourceTest/sql/postgresql/119/057=scripts.tsv
+++ b/openbis/sourceTest/sql/postgresql/119/057=scripts.tsv
@@ -5,4 +5,4 @@
 5	1	validateOK	\N	def validate(entity, isNew):\n  pass\n 	2010-10-27 15:16:48.994831+02	2	\N	ENTITY_VALIDATION
 6	1	validateFAIL	\N	def validate(entity, isNew):\n  return "This check always fail"\n 	2010-10-27 15:16:48.994831+02	2	\N	ENTITY_VALIDATION
 7	1	validateUpdateFAIL	\N	def validate(entity, isNew):\n  if (not isNew):\n    return "Cannot update this entity"\n 	2010-10-27 15:16:48.994831+02	2	\N	ENTITY_VALIDATION
-8	1	validateChildren	\N	def validate(entity, isNew):\n  for childRelation in entity.entityPE().getChildRelationships():\n    requestValidation(childRelation.getChildSample()) \n 	2010-10-27 15:16:48.994831+02	2	\N	ENTITY_VALIDATION
+8	1	testScript	\N	def validate(entity, isNew):\n  raise "Update this script before using"\n 	2010-10-27 15:16:48.994831+02	2	\N	ENTITY_VALIDATION