diff --git a/control_plane/src/endpoint.rs b/control_plane/src/endpoint.rs
index b19a6a1a18..3b033b32fd 100644
--- a/control_plane/src/endpoint.rs
+++ b/control_plane/src/endpoint.rs
@@ -290,6 +290,7 @@ impl Endpoint {
         conf.append("wal_log_hints", "off");
         conf.append("max_replication_slots", "10");
         conf.append("hot_standby", "on");
+        conf.append("hot_standby_feedback", "on");
         conf.append("shared_buffers", "1MB");
         conf.append("fsync", "off");
         conf.append("max_connections", "100");
diff --git a/test_runner/regress/test_replication_lag.py b/test_runner/regress/test_replication_lag.py
index 2b638eb017..e39c8a1007 100644
--- a/test_runner/regress/test_replication_lag.py
+++ b/test_runner/regress/test_replication_lag.py
@@ -1,4 +1,5 @@
 import threading
+import time
 
 from fixtures.log_helper import log
 from fixtures.neon_fixtures import NeonEnv, PgBin
@@ -33,6 +34,7 @@ def test_replication_lag(neon_simple_env: NeonEnv, pg_bin: PgBin):
         t.start()
 
         with env.endpoints.new_replica_start(origin=primary, endpoint_id="secondary") as secondary:
+            time.sleep(10)
             for _ in range(1, n_iterations):
                 primary_lsn = primary.safe_psql_scalar(
                     "SELECT pg_current_wal_flush_lsn()::text", log_query=False