diff --git a/test/core/end2end/fixtures/h2_http_proxy.c b/test/core/end2end/fixtures/h2_http_proxy.c
index a675a11f665..db4afe5c1c9 100644
--- a/test/core/end2end/fixtures/h2_http_proxy.c
+++ b/test/core/end2end/fixtures/h2_http_proxy.c
@@ -107,7 +107,9 @@ void chttp2_tear_down_fullstack(grpc_end2end_test_fixture *f) {
 
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
-    {"chttp2/fullstack", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION,
+    {"chttp2/fullstack",
+     FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION |
+     FEATURE_MASK_SUPPORTS_AUTHORITY_HEADER,
      chttp2_create_fixture_fullstack, chttp2_init_client_fullstack,
      chttp2_init_server_fullstack, chttp2_tear_down_fullstack},
 };