diff --git a/jjb/pipeline/voltha-scale-test.groovy b/jjb/pipeline/voltha-scale-test.groovy
index 235bb0b..d754f2e 100644
--- a/jjb/pipeline/voltha-scale-test.groovy
+++ b/jjb/pipeline/voltha-scale-test.groovy
@@ -274,7 +274,7 @@
 
             if [ ${provisionSubscribers} = false ] ; then
               # if we're not considering subscribers then we don't care about authentication and dhcp
-              ROBOT_PARAMS+="-e authentication -e provision -e flow-after -e dhcp"
+              ROBOT_PARAMS+="-e authentication -e provision -e flow-after -e dhcp "
             fi
 
             if [ ${withFlows} = false ] ; then