diff --git a/extensions/signal/src/monitor.tool-result.sends-tool-summaries-responseprefix.test.ts b/extensions/signal/src/monitor.tool-result.sends-tool-summaries-responseprefix.test.ts
index ccefd20b064..812895a15e6 100644
--- a/extensions/signal/src/monitor.tool-result.sends-tool-summaries-responseprefix.test.ts
+++ b/extensions/signal/src/monitor.tool-result.sends-tool-summaries-responseprefix.test.ts
@@ -1,9 +1,8 @@
 import { describe, expect, it, vi } from "vitest";
 import type { OpenClawConfig } from "../../../src/config/config.js";
-import { peekSystemEvents } from "../../../src/infra/system-events.js";
+import type { SignalDaemonExitEvent } from "./daemon.js";
 import { resolveAgentRoute } from "../../../src/routing/resolve-route.js";
 import { normalizeE164 } from "../../../src/utils.js";
-import type { SignalDaemonExitEvent } from "./daemon.js";
 import {
   createMockSignalDaemonHandle,
   config,
@@ -16,7 +15,11 @@ import {
 installSignalToolResultTestHooks();
 
 // Import after the harness registers `vi.mock(...)` for Signal internals.
-const { monitorSignalProvider } = await import("./monitor.js");
+vi.resetModules();
+const [{ peekSystemEvents }, { monitorSignalProvider }] = await Promise.all([
+  import("openclaw/plugin-sdk/infra-runtime"),
+  import("./monitor.js"),
+]);
 
 const {
   replyMock,
@@ -76,6 +79,7 @@ function createAutoAbortController() {
 async function runMonitorWithMocks(opts: MonitorSignalProviderOptions) {
   return monitorSignalProvider({
     config: config as OpenClawConfig,
+    waitForTransportReady: waitForTransportReadyMock as any,
     ...opts,
   });
 }
diff --git a/extensions/signal/src/monitor.tool-result.test-harness.ts b/extensions/signal/src/monitor.tool-result.test-harness.ts
index 7445fc0ffb7..ad81a4d6da2 100644
--- a/extensions/signal/src/monitor.tool-result.test-harness.ts
+++ b/extensions/signal/src/monitor.tool-result.test-harness.ts
@@ -171,7 +171,7 @@ export function installSignalToolResultTestHooks() {
     replyMock.mockReset();
     updateLastRouteMock.mockReset();
     streamMock.mockReset();
-    signalCheckMock.mockReset().mockResolvedValue({});
+    signalCheckMock.mockReset().mockResolvedValue({ ok: true });
     signalRpcRequestMock.mockReset().mockResolvedValue({});
     spawnSignalDaemonMock.mockReset().mockReturnValue(createMockSignalDaemonHandle());
     readAllowFromStoreMock.mockReset().mockResolvedValue([]);
diff --git a/extensions/signal/src/monitor.ts b/extensions/signal/src/monitor.ts
index 20f0c943823..bdc3da35baf 100644
--- a/extensions/signal/src/monitor.ts
+++ b/extensions/signal/src/monitor.ts
@@ -1,12 +1,13 @@
 import type { OpenClawConfig } from "openclaw/plugin-sdk/config-runtime";
+import type { SignalReactionNotificationMode } from "openclaw/plugin-sdk/config-runtime";
+import type { BackoffPolicy } from "openclaw/plugin-sdk/infra-runtime";
+import type { ReplyPayload } from "openclaw/plugin-sdk/reply-runtime";
 import { loadConfig } from "openclaw/plugin-sdk/config-runtime";
 import {
   resolveAllowlistProviderRuntimeGroupPolicy,
   resolveDefaultGroupPolicy,
   warnMissingProviderGroupPolicyFallbackOnce,
 } from "openclaw/plugin-sdk/config-runtime";
-import type { SignalReactionNotificationMode } from "openclaw/plugin-sdk/config-runtime";
-import type { BackoffPolicy } from "openclaw/plugin-sdk/infra-runtime";
 import { waitForTransportReady } from "openclaw/plugin-sdk/infra-runtime";
 import { saveMediaBuffer } from "openclaw/plugin-sdk/media-runtime";
 import {
@@ -19,20 +20,19 @@ import {
   resolveTextChunkLimit,
 } from "openclaw/plugin-sdk/reply-runtime";
 import { DEFAULT_GROUP_HISTORY_LIMIT, type HistoryEntry } from "openclaw/plugin-sdk/reply-runtime";
-import type { ReplyPayload } from "openclaw/plugin-sdk/reply-runtime";
 import { createNonExitingRuntime, type RuntimeEnv } from "openclaw/plugin-sdk/runtime-env";
 import { normalizeStringEntries } from "openclaw/plugin-sdk/text-runtime";
 import { normalizeE164 } from "openclaw/plugin-sdk/text-runtime";
-import { resolveSignalAccount } from "./accounts.js";
-import { signalCheck, signalRpcRequest } from "./client.js";
-import { formatSignalDaemonExit, spawnSignalDaemon, type SignalDaemonHandle } from "./daemon.js";
-import { isSignalSenderAllowed, type resolveSignalSender } from "./identity.js";
-import { createSignalEventHandler } from "./monitor/event-handler.js";
 import type {
   SignalAttachment,
   SignalReactionMessage,
   SignalReactionTarget,
 } from "./monitor/event-handler.types.js";
+import { resolveSignalAccount } from "./accounts.js";
+import { signalCheck, signalRpcRequest } from "./client.js";
+import { formatSignalDaemonExit, spawnSignalDaemon, type SignalDaemonHandle } from "./daemon.js";
+import { isSignalSenderAllowed, type resolveSignalSender } from "./identity.js";
+import { createSignalEventHandler } from "./monitor/event-handler.js";
 import { sendMessageSignal } from "./send.js";
 import { runSignalSseLoop } from "./sse-reconnect.js";
 
@@ -56,6 +56,7 @@ export type MonitorSignalOpts = {
   groupAllowFrom?: Array<string | number>;
   mediaMaxMb?: number;
   reconnectPolicy?: Partial<BackoffPolicy>;
+  waitForTransportReady?: typeof waitForTransportReady;
 };
 
 function resolveRuntime(opts: MonitorSignalOpts): RuntimeEnv {
@@ -217,8 +218,10 @@ async function waitForSignalDaemonReady(params: {
   logAfterMs: number;
   logIntervalMs?: number;
   runtime: RuntimeEnv;
+  waitForTransportReadyFn?: typeof waitForTransportReady;
 }): Promise<void> {
-  await waitForTransportReady({
+  const waitForTransportReadyFn = params.waitForTransportReadyFn ?? waitForTransportReady;
+  await waitForTransportReadyFn({
     label: "signal daemon",
     timeoutMs: params.timeoutMs,
     logAfterMs: params.logAfterMs,
@@ -374,6 +377,7 @@ export async function monitorSignalProvider(opts: MonitorSignalOpts = {}): Promi
   const mediaMaxBytes = (opts.mediaMaxMb ?? accountInfo.config.mediaMaxMb ?? 8) * 1024 * 1024;
   const ignoreAttachments = opts.ignoreAttachments ?? accountInfo.config.ignoreAttachments ?? false;
   const sendReadReceipts = Boolean(opts.sendReadReceipts ?? accountInfo.config.sendReadReceipts);
+  const waitForTransportReadyFn = opts.waitForTransportReady ?? waitForTransportReady;
 
   const autoStart = opts.autoStart ?? accountInfo.config.autoStart ?? !accountInfo.config.httpUrl;
   const startupTimeoutMs = Math.min(
@@ -416,6 +420,7 @@ export async function monitorSignalProvider(opts: MonitorSignalOpts = {}): Promi
         logAfterMs: 10_000,
         logIntervalMs: 10_000,
         runtime,
+        waitForTransportReadyFn,
       });
       const daemonExitError = daemonLifecycle.getExitError();
       if (daemonExitError) {