diff --git a/ckan/new_tests/helpers.py b/ckan/new_tests/helpers.py
index 2b35418bde0..371f5e02787 100644
--- a/ckan/new_tests/helpers.py
+++ b/ckan/new_tests/helpers.py
@@ -40,9 +40,7 @@ def reset_db():
 
     # Clean out any data from the db. This prevents tests failing due to data
     # leftover from other tests or from previous test runs.
-    for table in reversed(model.meta.metadata.sorted_tables):
-        model.meta.Session.execute(table.delete())
-    model.meta.Session.commit()
+    model.repo.delete_all()
 
 
 def call_action(action_name, context=None, **kwargs):