diff --git a/extensions/discord/src/monitor.tool-result.test-harness.ts b/extensions/discord/src/monitor.tool-result.test-harness.ts
index 947a8b25731..c69173c842b 100644
--- a/extensions/discord/src/monitor.tool-result.test-harness.ts
+++ b/extensions/discord/src/monitor.tool-result.test-harness.ts
@@ -9,26 +9,10 @@ export const readAllowFromStoreMock: MockFn = vi.fn();
 export const upsertPairingRequestMock: MockFn = vi.fn();
 export const loadConfigMock: MockFn = vi.fn();
 
+export const TOOL_RESULT_SESSION_STORE_PATH = `/tmp/openclaw-sessions-${process.pid}.json`;
+
 const sendModule = await import("./send.js");
-vi.spyOn(sendModule, "sendMessageDiscord").mockImplementation(
-  (...args) => sendMock(...args) as never,
-);
-vi.spyOn(sendModule, "reactMessageDiscord").mockImplementation(async (...args) => {
-  reactMock(...args);
-  return { ok: true };
-});
-
 const replyRuntimeModule = await import("openclaw/plugin-sdk/reply-runtime");
-vi.spyOn(replyRuntimeModule, "dispatchInboundMessage").mockImplementation(
-  (...args) => dispatchMock(...args) as never,
-);
-vi.spyOn(replyRuntimeModule, "dispatchInboundMessageWithDispatcher").mockImplementation(
-  (...args) => dispatchMock(...args) as never,
-);
-vi.spyOn(replyRuntimeModule, "dispatchInboundMessageWithBufferedDispatcher").mockImplementation(
-  (...args) => dispatchMock(...args) as never,
-);
-
 const conversationRuntimeModule = await import("openclaw/plugin-sdk/conversation-runtime");
 type ReadChannelAllowFromStore = typeof conversationRuntimeModule.readChannelAllowFromStore;
 type UpsertChannelPairingRequest = typeof conversationRuntimeModule.upsertChannelPairingRequest;
@@ -49,22 +33,42 @@ function createPairingStoreMocks() {
 }
 
 const pairingStoreMocks = createPairingStoreMocks();
-vi.spyOn(conversationRuntimeModule, "readChannelAllowFromStore").mockImplementation((...args) =>
-  pairingStoreMocks.readChannelAllowFromStore(...args),
-);
-vi.spyOn(conversationRuntimeModule, "upsertChannelPairingRequest").mockImplementation((...args) =>
-  pairingStoreMocks.upsertChannelPairingRequest(...args),
-);
-
 const configRuntimeModule = await import("openclaw/plugin-sdk/config-runtime");
-vi.spyOn(configRuntimeModule, "loadConfig").mockImplementation(
-  (...args) => loadConfigMock(...args) as never,
-);
-vi.spyOn(configRuntimeModule, "readSessionUpdatedAt").mockImplementation(() => undefined);
-vi.spyOn(configRuntimeModule, "resolveStorePath").mockImplementation(
-  () => "/tmp/openclaw-sessions.json",
-);
-vi.spyOn(configRuntimeModule, "updateLastRoute").mockImplementation(
-  (...args) => updateLastRouteMock(...args) as never,
-);
-vi.spyOn(configRuntimeModule, "resolveSessionKey").mockImplementation(vi.fn() as never);
+
+export function installDiscordToolResultHarnessSpies() {
+  vi.spyOn(sendModule, "sendMessageDiscord").mockImplementation(
+    (...args) => sendMock(...args) as never,
+  );
+  vi.spyOn(sendModule, "reactMessageDiscord").mockImplementation(async (...args) => {
+    reactMock(...args);
+    return { ok: true };
+  });
+  vi.spyOn(replyRuntimeModule, "dispatchInboundMessage").mockImplementation(
+    (...args) => dispatchMock(...args) as never,
+  );
+  vi.spyOn(replyRuntimeModule, "dispatchInboundMessageWithDispatcher").mockImplementation(
+    (...args) => dispatchMock(...args) as never,
+  );
+  vi.spyOn(replyRuntimeModule, "dispatchInboundMessageWithBufferedDispatcher").mockImplementation(
+    (...args) => dispatchMock(...args) as never,
+  );
+  vi.spyOn(conversationRuntimeModule, "readChannelAllowFromStore").mockImplementation((...args) =>
+    pairingStoreMocks.readChannelAllowFromStore(...args),
+  );
+  vi.spyOn(conversationRuntimeModule, "upsertChannelPairingRequest").mockImplementation((...args) =>
+    pairingStoreMocks.upsertChannelPairingRequest(...args),
+  );
+  vi.spyOn(configRuntimeModule, "loadConfig").mockImplementation(
+    (...args) => loadConfigMock(...args) as never,
+  );
+  vi.spyOn(configRuntimeModule, "readSessionUpdatedAt").mockImplementation(() => undefined);
+  vi.spyOn(configRuntimeModule, "resolveStorePath").mockImplementation(
+    () => TOOL_RESULT_SESSION_STORE_PATH,
+  );
+  vi.spyOn(configRuntimeModule, "updateLastRoute").mockImplementation(
+    (...args) => updateLastRouteMock(...args) as never,
+  );
+  vi.spyOn(configRuntimeModule, "resolveSessionKey").mockImplementation(vi.fn() as never);
+}
+
+installDiscordToolResultHarnessSpies();
diff --git a/extensions/discord/src/monitor.tool-result.test-helpers.ts b/extensions/discord/src/monitor.tool-result.test-helpers.ts
index 0b3eaefe41e..930182f0340 100644
--- a/extensions/discord/src/monitor.tool-result.test-helpers.ts
+++ b/extensions/discord/src/monitor.tool-result.test-helpers.ts
@@ -4,9 +4,11 @@ import type { loadConfig } from "openclaw/plugin-sdk/config-runtime";
 import { vi } from "vitest";
 import {
   dispatchMock,
+  installDiscordToolResultHarnessSpies,
   loadConfigMock,
   readAllowFromStoreMock,
   sendMock,
+  TOOL_RESULT_SESSION_STORE_PATH,
   updateLastRouteMock,
   upsertPairingRequestMock,
 } from "./monitor.tool-result.test-harness.js";
@@ -26,7 +28,7 @@ export const BASE_CFG: Config = {
   messages: {
     inbound: { debounceMs: 0 },
   },
-  session: { store: "/tmp/openclaw-sessions.json" },
+  session: { store: TOOL_RESULT_SESSION_STORE_PATH },
 };
 
 export const CATEGORY_GUILD_CFG = {
@@ -45,6 +47,7 @@ export const CATEGORY_GUILD_CFG = {
 } satisfies Config;
 
 export function resetDiscordToolResultHarness() {
+  installDiscordToolResultHarnessSpies();
   __resetDiscordChannelInfoCacheForTest();
   sendMock.mockClear().mockResolvedValue(undefined);
   updateLastRouteMock.mockClear();
diff --git a/extensions/signal/src/monitor.tool-result.test-harness.ts b/extensions/signal/src/monitor.tool-result.test-harness.ts
index f51dd03b5c8..8608c9b372f 100644
--- a/extensions/signal/src/monitor.tool-result.test-harness.ts
+++ b/extensions/signal/src/monitor.tool-result.test-harness.ts
@@ -27,6 +27,9 @@ const streamMock = vi.hoisted(() => vi.fn()) as unknown as MockFn;
 const signalCheckMock = vi.hoisted(() => vi.fn()) as unknown as MockFn;
 const signalRpcRequestMock = vi.hoisted(() => vi.fn()) as unknown as MockFn;
 const spawnSignalDaemonMock = vi.hoisted(() => vi.fn()) as unknown as MockFn;
+const signalToolResultSessionStorePath = vi.hoisted(
+  () => `/tmp/openclaw-signal-tool-result-sessions-${process.pid}.json`,
+);
 
 export function getSignalToolResultTestMocks(): SignalToolResultTestMocks {
   return {
@@ -102,7 +105,7 @@ vi.mock("openclaw/plugin-sdk/config-runtime", async () => {
   return {
     ...actual,
     loadConfig: () => config,
-    resolveStorePath: vi.fn(() => "/tmp/openclaw-sessions.json"),
+    resolveStorePath: vi.fn(() => signalToolResultSessionStorePath),
     updateLastRoute: (...args: unknown[]) => updateLastRouteMock(...args),
     readSessionUpdatedAt: vi.fn(() => undefined),
     recordSessionMetaFromInbound: vi.fn().mockResolvedValue(undefined),
@@ -207,6 +210,7 @@ export function installSignalToolResultTestHooks() {
     resetInboundDedupe();
     config = {
       messages: { responsePrefix: "PFX" },
+      session: { store: signalToolResultSessionStorePath },
       channels: {
         signal: { autoStart: false, dmPolicy: "open", allowFrom: ["*"] },
       },