diff --git a/tools/run_tests/run_xds_tests.py b/tools/run_tests/run_xds_tests.py
index 94a16cb3536..1f453c9e400 100755
--- a/tools/run_tests/run_xds_tests.py
+++ b/tools/run_tests/run_xds_tests.py
@@ -1726,7 +1726,7 @@ try:
             server_uri = service_host_name + ':' + str(gcp.service_port)
         if args.xds_v3_support:
             client_env['GRPC_XDS_EXPERIMENTAL_V3_SUPPORT'] = 'true'
-            bootstrap_server_features.append('xds_v3')	
+            bootstrap_server_features.append('xds_v3')
         if args.bootstrap_file:
             bootstrap_path = os.path.abspath(args.bootstrap_file)
         else: