diff --git a/src/gateway/server-methods/chat.abort-authorization.test.ts b/src/gateway/server-methods/chat.abort-authorization.test.ts
index 52955904c87..c7a130a9f0b 100644
--- a/src/gateway/server-methods/chat.abort-authorization.test.ts
+++ b/src/gateway/server-methods/chat.abort-authorization.test.ts
@@ -6,6 +6,11 @@ import {
 } from "./chat.abort.test-helpers.js";
 import { chatHandlers } from "./chat.js";
 
+type AbortResponsePayload = {
+  aborted?: boolean;
+  runIds?: string[];
+};
+
 async function invokeSingleRunAbort({
   context,
   runId = "run-1",
@@ -55,7 +60,8 @@ describe("chat.abort authorization", () => {
     const [ok, payload, error] = respond.mock.calls.at(-1) ?? [];
     expect(ok).toBe(false);
     expect(payload).toBeUndefined();
-    expect(error).toMatchObject({ code: "INVALID_REQUEST", message: "unauthorized" });
+    expect(error?.code).toBe("INVALID_REQUEST");
+    expect(error?.message).toBe("unauthorized");
     expect(context.chatAbortControllers.has("run-1")).toBe(true);
   });
 
@@ -78,7 +84,9 @@ describe("chat.abort authorization", () => {
 
     const [ok, payload] = respond.mock.calls.at(-1) ?? [];
     expect(ok).toBe(true);
-    expect(payload).toMatchObject({ aborted: true, runIds: ["run-1"] });
+    const abortPayload = payload as AbortResponsePayload | undefined;
+    expect(abortPayload?.aborted).toBe(true);
+    expect(abortPayload?.runIds).toEqual(["run-1"]);
     expect(context.chatAbortControllers.has("run-1")).toBe(false);
   });
 
@@ -102,7 +110,9 @@ describe("chat.abort authorization", () => {
 
     const [ok, payload] = respond.mock.calls.at(-1) ?? [];
     expect(ok).toBe(true);
-    expect(payload).toMatchObject({ aborted: true, runIds: ["run-mine"] });
+    const abortPayload = payload as AbortResponsePayload | undefined;
+    expect(abortPayload?.aborted).toBe(true);
+    expect(abortPayload?.runIds).toEqual(["run-mine"]);
     expect(context.chatAbortControllers.has("run-mine")).toBe(false);
     expect(context.chatAbortControllers.has("run-other")).toBe(true);
   });
@@ -119,6 +129,8 @@ describe("chat.abort authorization", () => {
 
     const [ok, payload] = respond.mock.calls.at(-1) ?? [];
     expect(ok).toBe(true);
-    expect(payload).toMatchObject({ aborted: true, runIds: ["run-1"] });
+    const abortPayload = payload as AbortResponsePayload | undefined;
+    expect(abortPayload?.aborted).toBe(true);
+    expect(abortPayload?.runIds).toEqual(["run-1"]);
   });
 });