diff --git a/jenkins/helper/test_config.py b/jenkins/helper/test_config.py
index d7d984af..c68c91d8 100644
--- a/jenkins/helper/test_config.py
+++ b/jenkins/helper/test_config.py
@@ -2,6 +2,7 @@
 """ keep the config for one testsuite to execute """
 import copy
 import os
+import json
 
 from site_config import IS_WINDOWS, IS_MAC, TEMP
 TEST_LOG_FILES = []