diff --git a/Jenkinsfile b/Jenkinsfile
index 85ebd8aac41..af2e5f02300 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -202,7 +202,7 @@ void withPorts(Closure wrapped) {
 // from https://issues.jenkins-ci.org/browse/JENKINS-27395?focusedCommentId=256459&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-256459
 void setJUnitPrefix(prefix, files) {
   // add prefix to qualified classname
-  sh "find . -path \"*/${file}\" -exec sed -i \"s/\\(<testcase .*classname=['\\\"]\\)\\([a-z]\\)/\\1${prefix}.\\2/g\" '{}' +"
+  sh "find . -path \"*/${files}\" -exec sed -i \"s/\\(<testcase .*classname=['\\\"]\\)\\([a-z]\\)/\\1${prefix}.\\2/g\" '{}' +"
 }
 
 void archiveTestFilesIfUnstable() {