diff --git a/packages/passport/sdk/src/network/chains.ts b/packages/passport/sdk/src/network/chains.ts
index 4fd7c9dbc3..7ad5161fdc 100644
--- a/packages/passport/sdk/src/network/chains.ts
+++ b/packages/passport/sdk/src/network/chains.ts
@@ -9,7 +9,7 @@
  */
 export enum ChainId {
   IMTBL_ZKEVM_MAINNET = 13371,
-  IMTBL_ZKEVM_TESTNET = 13472,
+  IMTBL_ZKEVM_TESTNET = 13473,
   IMTBL_ZKEVM_DEVNET = 13433,
   ETHEREUM = 1,
   SEPOLIA = 11155111,
diff --git a/packages/passport/sdk/src/test/mocks.ts b/packages/passport/sdk/src/test/mocks.ts
index 136d4628f9..0c384cc9c8 100644
--- a/packages/passport/sdk/src/test/mocks.ts
+++ b/packages/passport/sdk/src/test/mocks.ts
@@ -1,12 +1,13 @@
 import { Environment, ImmutableConfiguration } from '@imtbl/config';
 import { User, UserImx, UserZkEvm } from '../types';
 import { PassportConfiguration } from '../config';
+import { ChainId } from '../network/chains';
 
 export const mockErrorMessage = 'Server is down';
 export const mockStarkSignature = 'starkSignature';
 
-export const chainId = 13472;
-export const chainIdHex = '0x34a0';
+export const chainId = ChainId.IMTBL_ZKEVM_TESTNET;
+export const chainIdHex = '0x34a1';
 export const chainIdEip155 = `eip155:${chainId}`;
 
 const accessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwczovL2V4YW1wbGUuYXV0aDAuY29tLyIsImF1ZCI6Imh0dHBzOi8vYXBpLmV4YW1wbGUuY29tL2NhbGFuZGFyL3YxLyIsInN1YiI6InVzcl8xMjMiLCJpYXQiOjE0NTg3ODU3OTYsImV4cCI6MTQ1ODg3MjE5Nn0.CA7eaHjIHz5NxeIJoFK9krqaeZrPLwmMmgI_XiQiIkQ';
diff --git a/packages/passport/sdk/src/zkEvm/user/registerZkEvmUser.test.ts b/packages/passport/sdk/src/zkEvm/user/registerZkEvmUser.test.ts
index bd72e3bf65..ff40043ace 100644
--- a/packages/passport/sdk/src/zkEvm/user/registerZkEvmUser.test.ts
+++ b/packages/passport/sdk/src/zkEvm/user/registerZkEvmUser.test.ts
@@ -3,7 +3,7 @@ import { JsonRpcProvider, Web3Provider } from '@ethersproject/providers';
 import { signRaw } from '@imtbl/toolkit';
 import { MultiRollupApiClients } from '@imtbl/generated-clients';
 import { PassportConfiguration } from 'config';
-import { ChainName } from 'network/chains';
+import { ChainId, ChainName } from 'network/chains';
 import { registerZkEvmUser } from './registerZkEvmUser';
 import AuthManager from '../../authManager';
 import { mockUser, mockUserZkEvm } from '../../test/mocks';
@@ -28,7 +28,7 @@ describe('registerZkEvmUser', () => {
   };
   const jsonRPCProvider = {
     ready: {
-      chainId: 13472,
+      chainId: ChainId.IMTBL_ZKEVM_TESTNET,
     },
   };
   const ethereumAddress = '0x3082e7c88f1c8b4e24be4a75dee018ad362d84d4';