diff --git a/extensions/microsoft/speech-provider.test.ts b/extensions/microsoft/speech-provider.test.ts
index 9579389861e..8218ef750f2 100644
--- a/extensions/microsoft/speech-provider.test.ts
+++ b/extensions/microsoft/speech-provider.test.ts
@@ -25,6 +25,28 @@ import * as ttsModule from "./tts.js";
 
 const TEST_CFG = {} as OpenClawConfig;
 
+function requireFirstEdgeTtsCall(edgeSpy: ReturnType<typeof vi.spyOn>): {
+  config?: unknown;
+  outputPath: string;
+  text?: string;
+  timeoutMs?: number;
+} {
+  const [call] = edgeSpy.mock.calls;
+  if (!call) {
+    throw new Error("expected Microsoft Edge TTS call");
+  }
+  const [edgeCall] = call;
+  if (!edgeCall || typeof edgeCall !== "object" || Array.isArray(edgeCall)) {
+    throw new Error("expected Microsoft Edge TTS call");
+  }
+  return edgeCall as {
+    config?: unknown;
+    outputPath: string;
+    text?: string;
+    timeoutMs?: number;
+  };
+}
+
 describe("listMicrosoftVoices", () => {
   const proxyReset = installDebugProxyTestResetHooks();
 
@@ -213,10 +235,7 @@ describe("buildMicrosoftSpeechProvider", () => {
     });
 
     expect(edgeSpy).toHaveBeenCalledOnce();
-    const edgeCall = edgeSpy.mock.calls[0]?.[0];
-    if (!edgeCall) {
-      throw new Error("expected Microsoft Edge TTS call");
-    }
+    const edgeCall = requireFirstEdgeTtsCall(edgeSpy);
     expect(edgeCall.text).toBe("你好，这是一个测试 hello");
     expect(path.basename(edgeCall.outputPath)).toBe("speech.mp3");
     expect(edgeCall.timeoutMs).toBe(1000);
@@ -258,10 +277,7 @@ describe("buildMicrosoftSpeechProvider", () => {
     });
 
     expect(edgeSpy).toHaveBeenCalledOnce();
-    const edgeCall = edgeSpy.mock.calls[0]?.[0];
-    if (!edgeCall) {
-      throw new Error("expected Microsoft Edge TTS call");
-    }
+    const edgeCall = requireFirstEdgeTtsCall(edgeSpy);
     expect(edgeCall.text).toBe("你好，这是一个测试 hello");
     expect(path.basename(edgeCall.outputPath)).toBe("speech.mp3");
     expect(edgeCall.timeoutMs).toBe(1000);
diff --git a/extensions/nextcloud-talk/src/core.test.ts b/extensions/nextcloud-talk/src/core.test.ts
index 16a5a43a0bb..0e66c40d7fd 100644
--- a/extensions/nextcloud-talk/src/core.test.ts
+++ b/extensions/nextcloud-talk/src/core.test.ts
@@ -33,6 +33,14 @@ async function makeTempDir(): Promise<string> {
   return dir;
 }
 
+function requireFirstTimingSafeEqualCall(mock: ReturnType<typeof vi.fn>): [unknown, unknown] {
+  const [call] = mock.mock.calls;
+  if (!call) {
+    throw new Error("expected timingSafeEqual call");
+  }
+  return call as [unknown, unknown];
+}
+
 describe("nextcloud talk core", () => {
   it("builds an outbound session route for normalized room targets", () => {
     const route = resolveNextcloudTalkOutboundSessionRoute({
@@ -216,7 +224,7 @@ describe("nextcloud talk core", () => {
       ).toBe(false);
 
       expect(timingSafeEqualMock).toHaveBeenCalledOnce();
-      const [leftBuffer, rightBuffer] = timingSafeEqualMock.mock.calls[0] ?? [];
+      const [leftBuffer, rightBuffer] = requireFirstTimingSafeEqualCall(timingSafeEqualMock);
       expect(Buffer.isBuffer(leftBuffer)).toBe(true);
       expect(Buffer.isBuffer(rightBuffer)).toBe(true);
       if (!Buffer.isBuffer(leftBuffer) || !Buffer.isBuffer(rightBuffer)) {
diff --git a/extensions/nextcloud-talk/src/inbound.behavior.test.ts b/extensions/nextcloud-talk/src/inbound.behavior.test.ts
index 8d3db88c377..f7969fe4ec4 100644
--- a/extensions/nextcloud-talk/src/inbound.behavior.test.ts
+++ b/extensions/nextcloud-talk/src/inbound.behavior.test.ts
@@ -84,6 +84,22 @@ function createRuntimeEnv() {
   } as unknown as RuntimeEnv;
 }
 
+function requireFirstMockArg(mock: ReturnType<typeof vi.fn>, label: string): unknown {
+  const [call] = mock.mock.calls;
+  if (!call) {
+    throw new Error(`expected ${label}`);
+  }
+  return call[0];
+}
+
+function requireFirstSendMessageCall(): [unknown, unknown, unknown] {
+  const [call] = sendMessageNextcloudTalkMock.mock.calls;
+  if (!call) {
+    throw new Error("expected Nextcloud Talk send call");
+  }
+  return call as [unknown, unknown, unknown];
+}
+
 function createAccount(
   overrides?: Partial<ResolvedNextcloudTalkAccount>,
 ): ResolvedNextcloudTalkAccount {
@@ -154,17 +170,22 @@ describe("nextcloud-talk inbound behavior", () => {
       statusSink,
     });
 
-    const challengeParams = issueChallenge.mock.calls[0]?.[0] as
-      | { meta?: { name?: string }; senderId?: string; senderIdLine?: string }
-      | undefined;
-    expect(challengeParams?.senderId).toBe("user-1");
-    expect(challengeParams?.senderIdLine).toBe("Your Nextcloud user id: user-1");
-    expect(challengeParams?.meta).toEqual({ name: "Alice" });
+    const challengeParams = requireFirstMockArg(
+      issueChallenge,
+      "Nextcloud Talk pairing challenge",
+    ) as {
+      meta?: { name?: string };
+      senderId?: string;
+      senderIdLine?: string;
+    };
+    expect(challengeParams.senderId).toBe("user-1");
+    expect(challengeParams.senderIdLine).toBe("Your Nextcloud user id: user-1");
+    expect(challengeParams.meta).toEqual({ name: "Alice" });
     expect(sendMessageNextcloudTalkMock).toHaveBeenCalledTimes(1);
-    const sendArgs = sendMessageNextcloudTalkMock.mock.calls[0];
-    expect(sendArgs?.[0]).toBe("room-1");
-    expect(sendArgs?.[1]).toBe("Pair with code 123456");
-    expect(sendArgs?.[2]).toEqual({
+    const sendArgs = requireFirstSendMessageCall();
+    expect(sendArgs[0]).toBe("room-1");
+    expect(sendArgs[1]).toBe("Pair with code 123456");
+    expect(sendArgs[2]).toEqual({
       cfg: { channels: { "nextcloud-talk": {} } },
       accountId: "default",
     });
@@ -279,9 +300,10 @@ describe("nextcloud-talk inbound behavior", () => {
       runtime: createRuntimeEnv(),
     });
 
-    const assembledRequest = (
-      coreRuntime.channel.turn.runAssembled as unknown as { mock: { calls: unknown[][] } }
-    ).mock.calls[0]?.[0] as { replyPipeline?: unknown } | undefined;
-    expect(assembledRequest?.replyPipeline).toEqual({});
+    const assembledRequest = requireFirstMockArg(
+      coreRuntime.channel.turn.runAssembled as ReturnType<typeof vi.fn>,
+      "Nextcloud Talk assembled request",
+    ) as { replyPipeline?: unknown };
+    expect(assembledRequest.replyPipeline).toEqual({});
   });
 });
diff --git a/extensions/nextcloud-talk/src/room-info.test.ts b/extensions/nextcloud-talk/src/room-info.test.ts
index c47749ecedf..13df427d89c 100644
--- a/extensions/nextcloud-talk/src/room-info.test.ts
+++ b/extensions/nextcloud-talk/src/room-info.test.ts
@@ -26,6 +26,18 @@ afterEach(() => {
   __testing.resetRoomCache();
 });
 
+function requireFirstFetchParams(): { auditContext?: string; url?: string } {
+  const [call] = fetchWithSsrFGuard.mock.calls;
+  if (!call) {
+    throw new Error("expected Nextcloud Talk room info fetch call");
+  }
+  const [fetchParams] = call;
+  if (!fetchParams || typeof fetchParams !== "object" || Array.isArray(fetchParams)) {
+    throw new Error("expected Nextcloud Talk room info fetch call");
+  }
+  return fetchParams as { auditContext?: string; url?: string };
+}
+
 describe("nextcloud talk room info", () => {
   it("resolves direct rooms from the room info endpoint", async () => {
     const release = vi.fn(async () => {});
@@ -56,11 +68,11 @@ describe("nextcloud talk room info", () => {
     });
 
     expect(kind).toBe("direct");
-    const fetchParams = fetchWithSsrFGuard.mock.calls[0]?.[0];
-    expect(fetchParams?.url).toBe(
+    const fetchParams = requireFirstFetchParams();
+    expect(fetchParams.url).toBe(
       "https://nc.example.com/ocs/v2.php/apps/spreed/api/v4/room/room-direct",
     );
-    expect(fetchParams?.auditContext).toBe("nextcloud-talk.room-info");
+    expect(fetchParams.auditContext).toBe("nextcloud-talk.room-info");
     expect(release).toHaveBeenCalledTimes(1);
   });