diff --git a/tests/bbsim/Voltha_BBSimTests.robot b/tests/bbsim/Voltha_BBSimTests.robot
index 47643ba..cc420ca 100755
--- a/tests/bbsim/Voltha_BBSimTests.robot
+++ b/tests/bbsim/Voltha_BBSimTests.robot
@@ -58,6 +58,12 @@
 
 ${suppressaddsubscriber}    True
 
+# flag to choose the subscriber provisioning command type in ONOS
+# TT often provision a single services for a subscriber (eg: hsia, voip, ...) one after the other.
+# if set to True, command used is "volt-add-subscriber-unitag"
+# if set to False, comand used is "volt-add-subscriber-access"
+${unitag_sub}    False
+
 *** Test Cases ***
 
 Test Perform BBSim Sanity