diff --git a/test/plugin/runner-helper/src/main/resources/docker-compose.template b/test/plugin/runner-helper/src/main/resources/docker-compose.template
index fa928d19f..f73097044 100644
--- a/test/plugin/runner-helper/src/main/resources/docker-compose.template
+++ b/test/plugin/runner-helper/src/main/resources/docker-compose.template
@@ -38,7 +38,9 @@ services:
             - ${env}
         </#list>
         </#if>
+        <#if start_script??>
             - SCENARIO_START_SCRIPT=${start_script}
+        </#if>
             - SCENARIO_NAME=${scenario_name}
             - SCENARIO_VERSION=${scenario_version}
             - SCENARIO_ENTRY_SERVICE=${entry_service}