diff --git a/openprocurement/tender/esco/tests/tender.py b/openprocurement/tender/esco/tests/tender.py
index 0328a8f..fddc162 100644
--- a/openprocurement/tender/esco/tests/tender.py
+++ b/openprocurement/tender/esco/tests/tender.py
@@ -39,6 +39,7 @@
     tender_fundingKind_default,
     items_without_deliveryDate_quantity,
     tender_noticePublicationDate,
+    validate_items,
     # TestTenderEU
     create_tender_invalid,
     patch_tender,
@@ -65,6 +66,7 @@ class TenderESCOTest(BaseESCOWebTest):
     test_items_without_deliveryDate_quantity = snitch(items_without_deliveryDate_quantity)
     test_tender_fundingKind_default = snitch(tender_fundingKind_default)
     test_tender_noticePublicationDate = snitch(tender_noticePublicationDate)
+    test_validate_items = snitch(validate_items)
 
 
 class TestTenderEU(BaseESCOContentWebTest, TenderResourceTestMixin, TenderUAResourceTestMixin):
diff --git a/openprocurement/tender/esco/tests/tender_blanks.py b/openprocurement/tender/esco/tests/tender_blanks.py
index e32009a..8b6e692 100644
--- a/openprocurement/tender/esco/tests/tender_blanks.py
+++ b/openprocurement/tender/esco/tests/tender_blanks.py
@@ -1301,3 +1301,18 @@ def create_tender_generated(self):
     self.assertNotEqual(data['id'], tender['id'])
     self.assertNotEqual(data['doc_id'], tender['id'])
     self.assertNotEqual(data['tenderID'], tender['tenderID'])
+
+def validate_items(self):
+    data = deepcopy(self.initial_data)
+    data["items"][0]["classification"]["id"] = u"92332000-7"
+    data["items"].append(deepcopy(data["items"][0]))
+    data["items"][1]["classification"]["id"] = u"92340000-6"
+    response = self.app.post_json("/tenders", {"data": data}, status=422)
+
+    self.assertEqual(response.status, '422 Unprocessable Entity')
+    self.assertEqual(response.content_type, 'application/json')
+    self.assertEqual(response.json['errors'], [
+        {u'description': [u'CPV class of items should be identical'],
+         u'location': u'body',
+         u'name': u'items'}
+])