diff --git a/testdata/http_test_config.json b/testdata/http_test_config.json
index d90bc1624..f3dcf2cc9 100644
--- a/testdata/http_test_config.json
+++ b/testdata/http_test_config.json
@@ -30,6 +30,7 @@
   },
   "FlushFile": "",
   "FlushMaxPerBody": 0,
+  "FlushOnShutdown": false,
   "FlushWatchdogMissedFlushes": 0,
   "ForwardAddress": "",
   "ForwardUseGrpc": false,
@@ -143,4 +144,4 @@
   "XrayAddress": "",
   "XrayAnnotationTags": null,
   "XraySamplePercentage": 0
-}
\ No newline at end of file
+}
diff --git a/testdata/http_test_config.yaml b/testdata/http_test_config.yaml
index 53b9e52ef..01bb7c39b 100644
--- a/testdata/http_test_config.yaml
+++ b/testdata/http_test_config.yaml
@@ -27,6 +27,7 @@ features:
   migrate_span_sinks: false
 flush_file: ""
 flush_max_per_body: 0
+flush_on_shutdown: false
 flush_watchdog_missed_flushes: 0
 forward_address: ""
 forward_use_grpc: false