diff --git a/tempest/common/dynamic_creds.py b/tempest/common/dynamic_creds.py
index e5d65f5..3a3e3c2 100644
--- a/tempest/common/dynamic_creds.py
+++ b/tempest/common/dynamic_creds.py
@@ -122,7 +122,9 @@
         project = self.creds_client.create_project(
             name=project_name, description=project_desc)
 
-        username = data_utils.rand_name(root) + suffix
+        # NOTE(andreaf) User and project can be distinguished from the context,
+        # having the same ID in both makes it easier to match them and debug.
+        username = project_name
         user_password = data_utils.rand_password()
         email = data_utils.rand_name(root) + suffix + "@example.com"
         user = self.creds_client.create_user(