diff --git a/frontend/obsidian-plugin/src/debugging/flaky-websocket-factory.ts b/frontend/obsidian-plugin/src/debugging/flaky-websocket-factory.ts
index f2f3db0a..56310aa6 100644
--- a/frontend/obsidian-plugin/src/debugging/flaky-websocket-factory.ts
+++ b/frontend/obsidian-plugin/src/debugging/flaky-websocket-factory.ts
@@ -1,4 +1,5 @@
-import { helpers, Logger } from "sync-client";
+import type { Logger } from "sync-client";
+import { helpers } from "sync-client";
 
 export function flakyWebSocketFactory(
 	jitterScaleInSeconds: number,
@@ -53,7 +54,15 @@ export function flakyWebSocketFactory(
 			};
 		}
 
-		public async send(
+		public send(
+			data: string | ArrayBufferLike | Blob | ArrayBufferView
+		): void {
+			this.waitingSend(data).catch((error: unknown) => {
+				logger.error(`Error sending WebSocket message: ${error}`);
+			});
+		}
+
+		private async waitingSend(
 			data: string | ArrayBufferLike | Blob | ArrayBufferView
 		): Promise<void> {
 			// maintain message order
diff --git a/frontend/test-client/src/utils/flaky-websocket.ts b/frontend/test-client/src/utils/flaky-websocket-factory.ts
similarity index 89%
rename from frontend/test-client/src/utils/flaky-websocket.ts
rename to frontend/test-client/src/utils/flaky-websocket-factory.ts
index df1a98cd..6a146de2 100644
--- a/frontend/test-client/src/utils/flaky-websocket.ts
+++ b/frontend/test-client/src/utils/flaky-websocket-factory.ts
@@ -55,7 +55,15 @@ export function flakyWebSocketFactory(
 			};
 		}
 
-		public async send(
+		public send(
+			data: string | ArrayBufferLike | Blob | ArrayBufferView
+		): void {
+			this.waitingSend(data).catch((error: unknown) => {
+				logger.error(`Error sending WebSocket message: ${error}`);
+			});
+		}
+
+		private async waitingSend(
 			data: string | ArrayBufferLike | Blob | ArrayBufferView
 		): Promise<void> {
 			// maintain message order