@@ -8,6 +8,7 @@ const { installed } = vi.hoisted(() => ({
 }));
 
 vi.mock("electron-updater", () => ({
+  AppImageUpdater: vi.fn(),
   get autoUpdater() {
     return installed.updater;
   },
 
@@ -30,6 +30,7 @@ const installed = vi.hoisted(() => ({
   updater: undefined as typeof import("electron-updater").autoUpdater | undefined,
 }));
 vi.mock("electron-updater", () => ({
+  AppImageUpdater: vi.fn(),
   get autoUpdater() {
     if (!installed.updater) throw new Error("Unexpected native updater access");
     return installed.updater;
 
@@ -127,6 +127,7 @@ export function makeHarness(options: UpdatesHarnessOptions = {}) {
     metadata: Effect.die("unexpected metadata read"),
     name: Effect.succeed("T3 Code"),
     systemLocale: Effect.succeed("en-US"),
+    preferredSystemLanguages: Effect.succeed([]),
     whenReady: Effect.void,
     requestSingleInstanceLock: Effect.succeed(true),
     quit: Effect.void,