diff --git a/Jenkinsfile b/Jenkinsfile
index 73bd359..da1cb25 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,26 +1,26 @@
 pipeline {
 
     agent {
         docker {
             image 'python:3.7'
         }
     }
 
     environment {
-        HOME = $WORKSPACE
+        HOME = "$WORKSPACE"
     }
 
     stages {
         stage('install dependencies') {
             steps {
                 sh 'pip3 install --user pytest'
             }
         }
         stage('run tests') {
             steps {
                 sh 'python code/test.py'
             }
         }
     }
 
 }