diff --git a/testing_support/gerrit_test_case.py b/testing_support/gerrit_test_case.py
index 12b294384..087d0e18c 100644
--- a/testing_support/gerrit_test_case.py
+++ b/testing_support/gerrit_test_case.py
@@ -39,11 +39,7 @@ to gerrit.
 """
 
 import collections
-from cStringIO import StringIO
 import errno
-import httplib
-import imp
-import json
 import netrc
 import os
 import re