diff --git a/tools/run_tests/run_xds_tests.py b/tools/run_tests/run_xds_tests.py
index 97df3e9d877..e55cdf2b612 100755
--- a/tools/run_tests/run_xds_tests.py
+++ b/tools/run_tests/run_xds_tests.py
@@ -199,7 +199,7 @@ argp.add_argument('--network',
                   default='global/networks/default',
                   help='GCP network to use')
 argp.add_argument('--service_port_range',
-                  default='8080:8110',
+                  default='8080:8280',
                   type=parse_port_range,
                   help='Listening port for created gRPC backends. Specified as '
                   'either a single int or as a range in the format min:max, in '