diff --git a/extensions/matrix/src/matrix/monitor/index.test.ts b/extensions/matrix/src/matrix/monitor/index.test.ts
index 7039968dd0b..b7ddb8f9656 100644
--- a/extensions/matrix/src/matrix/monitor/index.test.ts
+++ b/extensions/matrix/src/matrix/monitor/index.test.ts
@@ -91,6 +91,7 @@ vi.mock("../../runtime.js", () => ({
 }));
 
 vi.mock("../accounts.js", () => ({
+  resolveConfiguredMatrixBotUserIds: vi.fn(() => new Set<string>()),
   resolveMatrixAccount: () => ({
     accountId: "default",
     config: {