diff --git a/client/src/lib/stores/auth-store.test.ts b/client/src/lib/stores/auth-store.test.ts
new file mode 100644
index 0000000..c81b442
--- /dev/null
+++ b/client/src/lib/stores/auth-store.test.ts
@@ -0,0 +1,111 @@
+import { beforeEach, describe, expect, it } from "vitest";
+import { act, renderHook } from "@testing-library/react";
+
+import { useAuthStore } from "./auth-store";
+
+const auth = {
+  email: "test@example.com",
+  authorized: true,
+  loading: true,
+};
+
+describe("authStore", () => {
+  beforeEach(() => {
+    sessionStorage.clear();
+  });
+
+  it("should have initial state", () => {
+    const { result } = renderHook(() => useAuthStore());
+
+    expect(result.current.email).toBe("");
+    expect(result.current.authorized).toBeFalsy();
+    expect(result.current.loading).toBeFalsy();
+  });
+
+  it("should set email correctly", () => {
+    const { result } = renderHook(() => useAuthStore());
+
+    act(() => {
+      result.current.setEmail(auth.email);
+    });
+
+    expect(result.current.email).toEqual(auth.email);
+  });
+
+  it("should set authorized correctly", () => {
+    const { result } = renderHook(() => useAuthStore());
+
+    act(() => {
+      result.current.setAuthorized(true);
+    });
+
+    expect(result.current.authorized).toEqual(auth.authorized);
+  });
+
+  it("should set loading correctly", () => {
+    const { result } = renderHook(() => useAuthStore());
+
+    act(() => {
+      result.current.setLoading(true);
+    });
+
+    expect(result.current.loading).toEqual(auth.loading);
+  });
+
+  it("should persist data in session storage", () => {
+    const { result } = renderHook(() => useAuthStore());
+
+    act(() => {
+      result.current.setEmail(auth.email);
+      result.current.setAuthorized(true);
+      result.current.setLoading(true);
+    });
+
+    const storedData = sessionStorage.getItem("go-react-auth");
+    expect(storedData).toBeTruthy();
+  });
+
+  it("should persist email and authorized only and it should be the same", () => {
+    const { result } = renderHook(() => useAuthStore());
+
+    act(() => {
+      result.current.setEmail(auth.email);
+      result.current.setAuthorized(true);
+      result.current.setLoading(true);
+    });
+
+    const storedData = sessionStorage.getItem("go-react-auth");
+    const parsedData = storedData ? JSON.parse(storedData) : "";
+    const email = parsedData.state.email;
+    const authorized = parsedData.state.authorized;
+    const loading = parsedData.state.loading;
+
+    expect(email).toEqual(auth.email);
+    expect(authorized).toEqual(auth.authorized);
+    expect(loading).toBeUndefined();
+  });
+
+  it("should reset", () => {
+    const { result } = renderHook(() => useAuthStore());
+
+    act(() => {
+      result.current.setEmail(auth.email);
+      result.current.setAuthorized(true);
+      result.current.setLoading(true);
+    });
+
+    expect(result.current.email).toEqual(auth.email);
+    expect(result.current.authorized).toBeTruthy();
+    expect(result.current.loading).toBeTruthy();
+
+    act(() => {
+      result.current.setEmail("");
+      result.current.setAuthorized(false);
+      result.current.setLoading(false);
+    });
+
+    expect(result.current.email).toEqual("");
+    expect(result.current.authorized).toBeFalsy();
+    expect(result.current.loading).toBeFalsy();
+  });
+});
diff --git a/client/src/lib/stores/user-store.test.ts b/client/src/lib/stores/user-store.test.ts
new file mode 100644
index 0000000..223128d
--- /dev/null
+++ b/client/src/lib/stores/user-store.test.ts
@@ -0,0 +1,85 @@
+import { beforeEach, describe, expect, it, test } from "vitest";
+import { act, renderHook } from "@testing-library/react";
+
+import { UserDTO } from "@/lib/DTO/user-dto";
+
+import { useUserStore } from "./user-store";
+
+const user: UserDTO = {
+  id: "abc123",
+  username: "Test",
+  email_address: "test@example.com",
+  last_signed_in: new Date(),
+  is_verified: false,
+  created_at: new Date(),
+  updated_at: new Date(),
+};
+
+describe("userStore", () => {
+  beforeEach(() => {
+    sessionStorage.clear();
+  });
+
+  it("should have initial state", () => {
+    const { result } = renderHook(() => useUserStore());
+    expect(result.current.user).toBeUndefined();
+  });
+
+  it("should set user correctly", () => {
+    const { result } = renderHook(() => useUserStore());
+
+    act(() => {
+      result.current.setUser(user);
+    });
+
+    expect(result.current.user).toEqual(user);
+  });
+
+  it("should persist user in session storage", () => {
+    const { result } = renderHook(() => useUserStore());
+
+    act(() => {
+      result.current.setUser(user);
+    });
+
+    const storedData = sessionStorage.getItem("go-react-user");
+    expect(storedData).toBeTruthy();
+  });
+
+  test("stored user should be the same", () => {
+    const { result } = renderHook(() => useUserStore());
+
+    act(() => {
+      result.current.setUser(user);
+    });
+
+    const storedData = sessionStorage.getItem("go-react-user");
+    const parseData = storedData ? JSON.parse(storedData) : "";
+    const storedUser = parseData.state.user;
+
+    const parsedUser = {
+      ...storedUser,
+      last_signed_in: new Date(storedUser.last_signed_in),
+      created_at: new Date(storedUser.created_at),
+      updated_at: new Date(storedUser.updated_at),
+    };
+
+    expect(parsedUser).toEqual(user);
+  });
+
+  it("should reset", () => {
+    const { result } = renderHook(() => useUserStore());
+
+    act(() => {
+      result.current.setUser(user);
+    });
+
+    expect(result.current.user).toEqual(user);
+
+    act(() => {
+      result.current.setUser(undefined);
+    });
+
+    expect(result.current.user).toBeUndefined();
+  });
+});