Adding support for per call credentials in core.
diff --git a/test/core/end2end/end2end_tests.h b/test/core/end2end/end2end_tests.h
index 41c6e2e..a61c725 100644
--- a/test/core/end2end/end2end_tests.h
+++ b/test/core/end2end/end2end_tests.h
@@ -41,6 +41,7 @@
 
 #define FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION 1
 #define FEATURE_MASK_SUPPORTS_HOSTNAME_VERIFICATION 2
+#define FEATURE_MASK_SUPPORTS_PER_CALL_CREDENTIALS 4
 
 struct grpc_end2end_test_fixture {
   grpc_completion_queue *server_cq;