diff --git a/muk_models_groupby_hour/__manifest__.py b/muk_models_groupby_hour/__manifest__.py
index 3a93cb8..5fa2547 100644
--- a/muk_models_groupby_hour/__manifest__.py
+++ b/muk_models_groupby_hour/__manifest__.py
@@ -25,7 +25,7 @@
     "description": """ 
         Allow records to be grouped by hour.
     """,
-    "version": '11.0.1.0.0',   
+    "version": '11.0.1.0.1',   
     "category": 'Extra Tools',   
     "license": "AGPL-3",
     "website": "http://www.mukit.at",
diff --git a/muk_models_groupby_hour/tests/test_groupby.py b/muk_models_groupby_hour/tests/test_groupby.py
index c015390..0fa26db 100644
--- a/muk_models_groupby_hour/tests/test_groupby.py
+++ b/muk_models_groupby_hour/tests/test_groupby.py
@@ -49,7 +49,7 @@ class AttachmentTestCase(common.TransactionCase):
     def test_groupy(self):
         result = self.attachment.read_group(
             domain=[],
-            fields=['name'],
+            fields=['name', 'create_date'],
             groupby='create_date:hour')
         _logger.warning(result)
         self.assertTrue(result)