diff --git a/server/src/crdt_sync/server/tests_keepalive.rs b/server/src/crdt_sync/server/tests_keepalive.rs
index b597ab18..bc33e757 100644
--- a/server/src/crdt_sync/server/tests_keepalive.rs
+++ b/server/src/crdt_sync/server/tests_keepalive.rs
@@ -234,7 +234,11 @@ async fn keepalive_connection_survives_with_pong_responses() {
     use tokio_tungstenite::{accept_async, connect_async};
 
     let ping_ms = 100u64;
-    let timeout_ms = 250u64;
+    // Generous timeout so the server's pong-deadline cannot fire within the
+    // test window even under CI scheduler jitter (the previous 250ms value
+    // gave only ~60ms of slack past the test's await window, which was a
+    // recurring source of flakes on CI).
+    let timeout_ms = 2000u64;
 
     let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
     let addr = listener.local_addr().unwrap();