diff --git a/extensions/signal/src/monitor.tool-result.test-harness.ts b/extensions/signal/src/monitor.tool-result.test-harness.ts
index ad81a4d6da2..7f1c8b7d7cf 100644
--- a/extensions/signal/src/monitor.tool-result.test-harness.ts
+++ b/extensions/signal/src/monitor.tool-result.test-harness.ts
@@ -66,8 +66,12 @@ export function createMockSignalDaemonHandle(
   };
 }
 
-vi.mock("openclaw/plugin-sdk/config-runtime", async (importOriginal) => {
-  const actual = await importOriginal<typeof import("openclaw/plugin-sdk/config-runtime")>();
+// Use importActual so shared-worker mocks from earlier test files do not leak
+// into this harness's partial overrides.
+vi.mock("openclaw/plugin-sdk/config-runtime", async () => {
+  const actual = await vi.importActual<typeof import("openclaw/plugin-sdk/config-runtime")>(
+    "openclaw/plugin-sdk/config-runtime",
+  );
   return {
     ...actual,
     loadConfig: () => config,
@@ -78,8 +82,10 @@ vi.mock("openclaw/plugin-sdk/config-runtime", async (importOriginal) => {
   };
 });
 
-vi.mock("openclaw/plugin-sdk/reply-runtime", async (importOriginal) => {
-  const actual = await importOriginal<typeof import("openclaw/plugin-sdk/reply-runtime")>();
+vi.mock("openclaw/plugin-sdk/reply-runtime", async () => {
+  const actual = await vi.importActual<typeof import("openclaw/plugin-sdk/reply-runtime")>(
+    "openclaw/plugin-sdk/reply-runtime",
+  );
   return {
     ...actual,
     getReplyFromConfig: (...args: unknown[]) => replyMock(...args),
@@ -104,8 +110,8 @@ vi.mock("openclaw/plugin-sdk/reply-runtime", async (importOriginal) => {
   };
 });
 
-vi.mock("./send.js", async (importOriginal) => {
-  const actual = await importOriginal<typeof import("./send.js")>();
+vi.mock("./send.js", async () => {
+  const actual = await vi.importActual<typeof import("./send.js")>("./send.js");
   return {
     ...actual,
     sendMessageSignal: (...args: unknown[]) => sendMock(...args),
@@ -114,8 +120,10 @@ vi.mock("./send.js", async (importOriginal) => {
   };
 });
 
-vi.mock("openclaw/plugin-sdk/conversation-runtime", async (importOriginal) => {
-  const actual = await importOriginal<typeof import("openclaw/plugin-sdk/conversation-runtime")>();
+vi.mock("openclaw/plugin-sdk/conversation-runtime", async () => {
+  const actual = await vi.importActual<typeof import("openclaw/plugin-sdk/conversation-runtime")>(
+    "openclaw/plugin-sdk/conversation-runtime",
+  );
   return {
     ...actual,
     readChannelAllowFromStore: (...args: unknown[]) => readAllowFromStoreMock(...args),
@@ -123,8 +131,10 @@ vi.mock("openclaw/plugin-sdk/conversation-runtime", async (importOriginal) => {
   };
 });
 
-vi.mock("openclaw/plugin-sdk/security-runtime", async (importOriginal) => {
-  const actual = await importOriginal<typeof import("openclaw/plugin-sdk/security-runtime")>();
+vi.mock("openclaw/plugin-sdk/security-runtime", async () => {
+  const actual = await vi.importActual<typeof import("openclaw/plugin-sdk/security-runtime")>(
+    "openclaw/plugin-sdk/security-runtime",
+  );
   return {
     ...actual,
     readStoreAllowFromForDmPolicy: (...args: unknown[]) => readAllowFromStoreMock(...args),
@@ -137,16 +147,18 @@ vi.mock("./client.js", () => ({
   signalRpcRequest: (...args: unknown[]) => signalRpcRequestMock(...args),
 }));
 
-vi.mock("./daemon.js", async (importOriginal) => {
-  const actual = await importOriginal<typeof import("./daemon.js")>();
+vi.mock("./daemon.js", async () => {
+  const actual = await vi.importActual<typeof import("./daemon.js")>("./daemon.js");
   return {
     ...actual,
     spawnSignalDaemon: (...args: unknown[]) => spawnSignalDaemonMock(...args),
   };
 });
 
-vi.mock("openclaw/plugin-sdk/infra-runtime", async (importOriginal) => {
-  const actual = await importOriginal<typeof import("openclaw/plugin-sdk/infra-runtime")>();
+vi.mock("openclaw/plugin-sdk/infra-runtime", async () => {
+  const actual = await vi.importActual<typeof import("openclaw/plugin-sdk/infra-runtime")>(
+    "openclaw/plugin-sdk/infra-runtime",
+  );
   return {
     ...actual,
     waitForTransportReady: (...args: unknown[]) => waitForTransportReadyMock(...args),