diff --git a/autogpt_platform/frontend/src/app/(platform)/copilot/__tests__/store.test.ts b/autogpt_platform/frontend/src/app/(platform)/copilot/__tests__/store.test.ts
index 061815a3f8..fd95bbdb2c 100644
--- a/autogpt_platform/frontend/src/app/(platform)/copilot/__tests__/store.test.ts
+++ b/autogpt_platform/frontend/src/app/(platform)/copilot/__tests__/store.test.ts
@@ -1,4 +1,4 @@
-import { describe, expect, it, beforeEach, vi } from "vitest";
+import { describe, expect, it, beforeEach, afterEach, vi } from "vitest";
 import { useCopilotUIStore } from "../store";
 
 vi.mock("@sentry/nextjs", () => ({
@@ -243,3 +243,24 @@ describe("useCopilotUIStore", () => {
     });
   });
 });
+
+describe("useCopilotUIStore localStorage initialisation", () => {
+  afterEach(() => {
+    vi.resetModules();
+    window.localStorage.clear();
+  });
+
+  it("reads fast chat mode from localStorage on store creation", async () => {
+    window.localStorage.setItem("copilot-mode", "fast");
+    vi.resetModules();
+    const { useCopilotUIStore: fresh } = await import("../store");
+    expect(fresh.getState().copilotChatMode).toBe("fast");
+  });
+
+  it("reads advanced model from localStorage on store creation", async () => {
+    window.localStorage.setItem("copilot-model", "advanced");
+    vi.resetModules();
+    const { useCopilotUIStore: fresh } = await import("../store");
+    expect(fresh.getState().copilotLlmModel).toBe("advanced");
+  });
+});