diff --git a/automation/scripts/include/xtf-runner b/automation/scripts/include/xtf-runner
index 43ff2d4d88..d1ef888465 100644
--- a/automation/scripts/include/xtf-runner
+++ b/automation/scripts/include/xtf-runner
@@ -69,7 +69,7 @@ function xtf_build_cmdline()
     local xtf_name=$2
     declare -a cmdline=()
     declare -A per_test_args=(
-        [argo]="argo=1 mac-permissive=1"
+        [argo]="argo=1,mac-permissive=1"
     )
 
     cmdline+=("${XEN_CMDLINE}")