diff --git a/Jenkinsfile b/Jenkinsfile
index 3abf0fb..2568c84 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -20,7 +20,7 @@ pipeline {
                    . pyenv/bin/activate
                    pip3 install -r requirements.txt
                 '''
-                sh 'tree tests/data'
+                sh 'ls -R tests/data'
                 sh 'pyenv/bin/python3 -m unittest discover tests'
             }
         }