diff --git a/Jenkinsfile b/Jenkinsfile
index a2bddc6..dbbc88f 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -183,9 +183,9 @@ Changelog of Git Changelog.
 
       stage('check for UTF-8 files') {
         steps {
-          sh '''echo "$(find . -type f -exec file {} \\;)" > FileList
-            mkdir tests
-            echo  "$(grep -v ASCII FileList | grep -v git)" > tests/UTF_Files'''
+          sh '''rm -Rf tests/UTF_Files
+                echo "$(find . -type f -exec file {} \\;)" > FileList
+                echo  "$(grep -v ASCII FileList | grep -v git)" > tests/UTF_Files'''
         }
       }