diff --git a/extensions/synology-chat/src/client.test.ts b/extensions/synology-chat/src/client.test.ts
index d5c55db21bb..37bf9cd26a4 100644
--- a/extensions/synology-chat/src/client.test.ts
+++ b/extensions/synology-chat/src/client.test.ts
@@ -121,7 +121,12 @@ describe("Synology Chat TLS verification defaults", () => {
     mockSuccessResponse();
     await settleTimers(invoke());
     const httpsRequest = vi.mocked(https.request);
-    expect(httpsRequest.mock.calls[0]?.[1]).toMatchObject({ rejectUnauthorized: true });
+    const firstCall = httpsRequest.mock.calls[0];
+    expect(firstCall).toBeDefined();
+    if (!firstCall) {
+      throw new Error("expected Synology Chat HTTPS request");
+    }
+    expect(firstCall[1]).toMatchObject({ rejectUnauthorized: true });
   });
 });
 
@@ -153,7 +158,12 @@ describe("sendMessage", () => {
     mockSuccessResponse();
     await settleTimers(sendMessage("https://nas.example.com/incoming", "Hello", undefined, true));
     const httpsRequest = vi.mocked(https.request);
-    expect(httpsRequest.mock.calls[0]?.[1]).toMatchObject({ rejectUnauthorized: false });
+    const firstCall = httpsRequest.mock.calls[0];
+    expect(firstCall).toBeDefined();
+    if (!firstCall) {
+      throw new Error("expected Synology Chat HTTPS request");
+    }
+    expect(firstCall[1]).toMatchObject({ rejectUnauthorized: false });
   });
 });
 
@@ -376,6 +386,11 @@ describe("fetchChatUsers", () => {
     await fetchChatUsers(freshUrl);
 
     const httpsGet = vi.mocked(https.get);
-    expect(httpsGet.mock.calls[0]?.[1]).toMatchObject({ rejectUnauthorized: true });
+    const firstCall = httpsGet.mock.calls[0];
+    expect(firstCall).toBeDefined();
+    if (!firstCall) {
+      throw new Error("expected Synology Chat HTTPS get");
+    }
+    expect(firstCall[1]).toMatchObject({ rejectUnauthorized: true });
   });
 });