diff --git a/tests/valuestore.py b/tests/valuestore.py
index 3e559ad..2444666 100644
--- a/tests/valuestore.py
+++ b/tests/valuestore.py
@@ -445,7 +445,8 @@ class ValuestoreTestCase(object):
                 '[Lev 0/Lev 1b | 0.00 € | Open]|balance_ref|0.00|2')
 
             # add bookings
-            Line.create([{
+            Line.create(self.prep_valstore_line_create_data(
+                [{
                 'cashbook': values[0].cashbook.id,  # Lev 0
                 'amount': Decimal('2.0'),
                 'bookingtype': 'in',
@@ -457,7 +458,7 @@ class ValuestoreTestCase(object):
                 'bookingtype': 'in',
                 'category': category.id,
                 'date': date(2022, 5, 10),
-                }])
+                }]))
 
             # add 'date' to context, will return computed
             # (not stored) values
@@ -572,6 +573,11 @@ class ValuestoreTestCase(object):
                 values[8].rec_name,
                 '[Lev 0/Lev 1b | 0.00 € | Open]|balance_ref|0.00|2')
 
+    def prep_valstore_line_create_data(self, query):
+        """ allow add of data
+        """
+        return query
+
     @with_transaction()
     def test_valstore_search_sort_books(self):
         """ create cashbooks add lines, search/sort
@@ -623,7 +629,8 @@ class ValuestoreTestCase(object):
             self.assertEqual(books[1].rec_name, 'Cashbook 2 | 0.00 € | Open')
             self.assertEqual(books[2].rec_name, 'Cashbook 3 | 0.00 € | Open')
 
-            Line.create([{
+            Line.create(self.prep_valstore_line_create_data(
+                [{
                 'cashbook': books[1].id,
                 'bookingtype': 'in',
                 'amount': Decimal('5.0'),
@@ -637,7 +644,7 @@ class ValuestoreTestCase(object):
                 'date': date(2022, 5, 7),
                 'description': '6€ in',
                 'category': category.id,
-                }])
+                }]))
 
             # no 'date' in context, using stored values
             # workers not yet processed