1 files changed, 1 insertions, 2 deletions
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index e5632fc8b5..204ed5c397 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -255,8 +255,7 @@ class CLanguage(object):
                  _ROOT + '/src/core/tsi/test_creds/ca.pem',
              'GRPC_POLL_STRATEGY': polling_strategy,
              'GRPC_VERBOSITY': 'DEBUG'}
-        # TODO(zyc): change this back before submission
-        resolver = 'ares';
+        resolver = os.environ.get('GRPC_DNS_RESOLVER', None);
         if resolver:
           env['GRPC_DNS_RESOLVER'] = resolver
         shortname_ext = '' if polling_strategy=='all' else ' GRPC_POLL_STRATEGY=%s' % polling_strategy