diff --git a/hwcompatible/job.py b/hwcompatible/job.py
index 45f0a8d243fedc1a3c50dec830962877d00aad72..5a3f3f812ab9daeea1805a11c5bca29bdaf10cff 100755
--- a/hwcompatible/job.py
+++ b/hwcompatible/job.py
@@ -249,7 +249,7 @@ class Job():
             return_code = False
 
         if reboot_flag:
-            if not _delete_case(name):
+            if not self._delete_case(name):
                 logger.error("Delete the data of test cases Failed!")
                 return_code = False
         if not subtests_filter: