diff --git a/packages/clerk-js/src/core/resources/Client.test.ts b/packages/clerk-js/src/core/resources/Client.test.ts
index ba6ceeef3c..20f460c310 100644
--- a/packages/clerk-js/src/core/resources/Client.test.ts
+++ b/packages/clerk-js/src/core/resources/Client.test.ts
@@ -1,29 +1,33 @@
 import type { ClientJSON } from '@clerk/types';
 
-import { createSession } from '../test/fixtures';
+import { createSession, createSignIn, createSignUp, createUser } from '../test/fixtures';
 import { BaseResource, Client } from './internal';
 
 describe('Client Singleton', () => {
   it('destroy', async () => {
-    const session = createSession();
+    const user = createUser({ first_name: 'John', last_name: 'Doe', id: 'user_1' });
+    const session = createSession({ id: 'session_1' }, user);
     const clientObjectJSON: ClientJSON = {
       object: 'client',
       id: 'test_id',
       status: 'active',
       last_active_session_id: 'test_session_id',
-      sign_in: null,
-      sign_up: null,
+      sign_in: createSignIn({ id: 'test_sign_in_id' }, user),
+      sign_up: createSignUp({ id: 'test_sign_up_id' }), //  This is only for testing purposes, this will never happen
       sessions: [session],
       created_at: jest.now() - 1000,
       updated_at: jest.now(),
     };
 
-    const destroyedSession = createSession({
-      id: 'test_session_id',
-      abandon_at: jest.now(),
-      status: 'ended',
-      last_active_token: undefined,
-    });
+    const destroyedSession = createSession(
+      {
+        id: 'test_session_id',
+        abandon_at: jest.now(),
+        status: 'ended',
+        last_active_token: undefined,
+      },
+      user,
+    );
 
     const clientObjectDeletedJSON = {
       id: 'test_id_deleted',
@@ -49,6 +53,8 @@ describe('Client Singleton', () => {
     expect(client.createdAt).not.toBeNull();
     expect(client.updatedAt).not.toBeNull();
     expect(client.lastActiveSessionId).not.toBeNull();
+    expect(client.signUp.id).toBe('test_sign_up_id');
+    expect(client.signIn.id).toBe('test_sign_in_id');
 
     await client.destroy();
 
@@ -56,6 +62,8 @@ describe('Client Singleton', () => {
     expect(client.createdAt).toBeNull();
     expect(client.updatedAt).toBeNull();
     expect(client.lastActiveSessionId).toBeNull();
+    expect(client.signUp.id).toBeUndefined();
+    expect(client.signIn.id).toBeUndefined();
 
     // @ts-expect-error This is a private method that we are mocking
     expect(BaseResource._fetch).toHaveBeenCalledWith({
diff --git a/packages/clerk-js/src/core/test/fixtures.ts b/packages/clerk-js/src/core/test/fixtures.ts
index 75dae9b1f9..00db010a70 100644
--- a/packages/clerk-js/src/core/test/fixtures.ts
+++ b/packages/clerk-js/src/core/test/fixtures.ts
@@ -8,6 +8,8 @@ import type {
   OrganizationPermission,
   PhoneNumberJSON,
   SessionJSON,
+  SignInJSON,
+  SignUpJSON,
   UserJSON,
 } from '@clerk/types';
 
@@ -166,8 +168,7 @@ export const createUser = (params: WithUserParams): UserJSON => {
   return res;
 };
 
-export const createSession = (sessionParams: WithSessionParams = {}, userParams: WithUserParams = {}) => {
-  const user = createUser(userParams);
+export const createSession = (sessionParams: WithSessionParams = {}, user: Partial<UserJSON> = {}) => {
   return {
     object: 'session',
     id: sessionParams.id,
@@ -183,7 +184,7 @@ export const createSession = (sessionParams: WithSessionParams = {}, userParams:
       last_name: user.last_name,
       image_url: user.image_url,
       has_image: user.has_image,
-      identifier: user.email_addresses.find(e => e.id === user.primary_email_address_id)?.email_address || '',
+      identifier: user.email_addresses?.find(e => e.id === user.primary_email_address_id)?.email_address || '',
       profile_image_url: user.profile_image_url,
     },
     created_at: sessionParams.created_at || jest.now() - 1000,
@@ -195,6 +196,56 @@ export const createSession = (sessionParams: WithSessionParams = {}, userParams:
   } as SessionJSON;
 };
 
+export const createSignIn = (signInParams: Partial<SignInJSON> = {}, user: Partial<UserJSON> = {}) => {
+  return {
+    id: signInParams.id,
+    created_session_id: signInParams.created_session_id,
+    status: signInParams.status,
+    first_factor_verification: signInParams.first_factor_verification,
+    identifier: signInParams.identifier,
+    object: 'sign_in',
+    second_factor_verification: signInParams.second_factor_verification,
+    supported_external_accounts: signInParams.supported_external_accounts,
+    supported_first_factors: signInParams.supported_first_factors,
+    supported_identifiers: signInParams.supported_identifiers,
+    supported_second_factors: signInParams.supported_second_factors,
+    user_data: {
+      first_name: user.first_name,
+      last_name: user.last_name,
+      image_url: user.image_url,
+      has_image: user.has_image,
+      profile_image_url: user.profile_image_url,
+    },
+  } as SignInJSON;
+};
+
+export const createSignUp = (signUpParams: Partial<SignUpJSON> = {}) => {
+  return {
+    id: signUpParams.id,
+    created_session_id: signUpParams.created_session_id,
+    status: signUpParams.status,
+    abandon_at: signUpParams.abandon_at,
+    created_user_id: signUpParams.created_user_id,
+    email_address: signUpParams.email_address,
+    external_account: signUpParams.external_account,
+    external_account_strategy: signUpParams.external_account_strategy,
+    first_name: signUpParams.first_name,
+    has_password: signUpParams.has_password,
+    last_name: signUpParams.last_name,
+    missing_fields: signUpParams.missing_fields,
+    object: 'sign_up',
+    optional_fields: signUpParams.optional_fields,
+    phone_number: signUpParams.phone_number,
+    required_fields: signUpParams.required_fields,
+    supported_external_accounts: signUpParams.supported_external_accounts,
+    unsafe_metadata: signUpParams.unsafe_metadata,
+    unverified_fields: signUpParams.unverified_fields,
+    username: signUpParams.username,
+    verifications: signUpParams.verifications,
+    web3_wallet: signUpParams.web3_wallet,
+  } as SignUpJSON;
+};
+
 export const clerkMock = () => {
   return {
     getFapiClient: jest.fn().mockReturnValue({