diff --git a/tests/units/backup-cron/test.sh b/tests/units/backup-cron/test.sh
index 091b23c..df175df 100644
--- a/tests/units/backup-cron/test.sh
+++ b/tests/units/backup-cron/test.sh
@@ -22,7 +22,7 @@ function start() {
         -e "RCLONE_REMOTE_DIR=${REMOTE_DIR}" \
         -e "ZIP_PASSWORD=${PASSWORD}" \
         -e "BACKUP_FILE_SUFFIX=test" \
-        -e "CRON='* * * * *'" \
+        -e "CRON=* * * * *" \
         "${DOCKER_IMAGE}"
 }