diff --git a/query-engine/connector-test-kit-rs/query-tests-setup/src/connector_tag/js/external_process.rs b/query-engine/connector-test-kit-rs/query-tests-setup/src/connector_tag/js/external_process.rs
index 7ab0e6e8a021..7059d64dc641 100644
--- a/query-engine/connector-test-kit-rs/query-tests-setup/src/connector_tag/js/external_process.rs
+++ b/query-engine/connector-test-kit-rs/query-tests-setup/src/connector_tag/js/external_process.rs
@@ -125,7 +125,10 @@ fn start_rpc_thread(mut receiver: mpsc::Receiver<ReqImpl>) -> Result<()> {
                                         let sender = pending_requests.remove(response.id()).unwrap();
                                         match response {
                                             jsonrpc_core::Output::Success(success) => {
-                                                sender.send(success.result).unwrap();
+                                                // The other end may be dropped if the whole
+                                                // request future was dropped and not polled to
+                                                // completion, so we ignore send errors here.
+                                                _ = sender.send(success.result);
                                             }
                                             jsonrpc_core::Output::Failure(err) => {
                                                 panic!("error response from jsonrpc: {err:?}")