diff --git a/ci/fireci/fireci/uploader.py b/ci/fireci/fireci/uploader.py
index 6c663e3fb72..cb8e617bf2b 100644
--- a/ci/fireci/fireci/uploader.py
+++ b/ci/fireci/fireci/uploader.py
@@ -22,7 +22,7 @@
 _logger = logging.getLogger('fireci.uploader')
 
 
-def post_report(test_report, metrics_service_url, access_token, metric_type):
+def post_report(test_report, metrics_service_url, access_token, metric_type, asynchronous=False):
   """Post a report to the metrics service backend."""
 
   endpoint = ''
@@ -31,6 +31,9 @@ def post_report(test_report, metrics_service_url, access_token, metric_type):
   elif os.getenv('PROW_JOB_ID'):
     endpoint = _construct_request_endpoint_for_prow(metric_type)
 
+  if asynchronous:
+    endpoint += '&async=true'
+
   headers = {'Authorization': f'Bearer {access_token}', 'Content-Type': 'application/json'}
   data = json.dumps(test_report)
 
diff --git a/ci/fireci/fireciplugins/macrobenchmark/commands.py b/ci/fireci/fireciplugins/macrobenchmark/commands.py
index 702c9d662f7..2099a6de935 100644
--- a/ci/fireci/fireciplugins/macrobenchmark/commands.py
+++ b/ci/fireci/fireciplugins/macrobenchmark/commands.py
@@ -163,7 +163,13 @@ def ci(pull_request, repeat):
     if ftl_results:
       metric_service_url = 'https://api.firebase-sdk-health-metrics.com'
       access_token = ci_utils.gcloud_identity_token()
-      uploader.post_report(startup_time_data, metric_service_url, access_token, 'startup-time')
+      uploader.post_report(
+        test_report=startup_time_data,
+        metrics_service_url=metric_service_url,
+        access_token=access_token,
+        metric_type='startup-time',
+        asynchronous=True
+      )
 
   if exception:
     raise exception