diff --git a/buidler.config.ts b/buidler.config.ts
index 38e2ac92..85e27631 100644
--- a/buidler.config.ts
+++ b/buidler.config.ts
@@ -2,7 +2,6 @@ import {usePlugin, BuidlerConfig} from '@nomiclabs/buidler/config';
 // @ts-ignore
 import {accounts} from './test-wallets.js';
 import {eEthereumNetwork} from './helpers/types';
-import {BUIDLEREVM_CHAINID, COVERAGE_CHAINID} from './helpers/constants';
 
 usePlugin('@nomiclabs/buidler-ethers');
 usePlugin('buidler-typechain');
@@ -10,7 +9,8 @@ usePlugin('solidity-coverage');
 usePlugin('@nomiclabs/buidler-waffle');
 usePlugin('@nomiclabs/buidler-etherscan');
 //usePlugin('buidler-gas-reporter');
-
+const BUIDLEREVM_CHAINID = 31337;
+const COVERAGE_CHAINID = 1337;
 const DEFAULT_BLOCK_GAS_LIMIT = 10000000;
 const DEFAULT_GAS_PRICE = 10;
 const HARDFORK = 'istanbul';