diff --git a/misc/service-tests/bamboo/bamboo_get_employee.bpmn b/misc/service-tests/bamboo/bamboo_get_employee.bpmn
index ceb148c8..be30688f 100644
--- a/misc/service-tests/bamboo/bamboo_get_employee.bpmn
+++ b/misc/service-tests/bamboo/bamboo_get_employee.bpmn
@@ -37,7 +37,7 @@ if is_bamboo_first_name:
     get_employee_fields_cnt = get_employee_fields_cnt + 1
 
 if is_bamboo_last_name:
-    get_employee_fields = get_employee_fields + "lastName" if get_employee_fields_cnt = 0 else ",lastName"
+    get_employee_fields = get_employee_fields + ("lastName" if get_employee_fields_cnt = 0 else ",lastName")
     get_employee_fields_cnt = get_employee_fields_cnt + 1
 
 if is_bamboo_preferred_name: