--- a/tests/src/eth/allowlist.test.ts
+++ b/tests/src/eth/allowlist.test.ts
@@ -19,12 +19,8 @@
 import {isAllowlisted, normalizeAccountId} from '../util/helpers';
 import {
   contractHelpers,
-  createEthAccount,
   createEthAccountWithBalance,
   deployFlipper,
-  evmCollection,
-  evmCollectionHelpers,
-  getCollectionAddressFromResult,
   itWeb3,
 } from './util/helpers';
 import {itEth, usingEthPlaygrounds} from './util/playgrounds';
--- /dev/null
+++ b/tests/src/eth/proxyContract.test.ts
@@ -0,0 +1,124 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+import {IKeyringPair} from '@polkadot/types/types';
+
+import {itEth, expect, usingEthPlaygrounds, EthUniqueHelper} from './util/playgrounds';
+
+describe('EVM payable contracts', () => {
+  let donor: IKeyringPair;
+
+  before(async function() {
+    await usingEthPlaygrounds(async (_, privateKey) => {
+      donor = privateKey('//Alice');
+    });
+  });
+
+  itEth('Update proxy contract', async({helper}) => {
+    const deployer = await helper.eth.createAccountWithBalance(donor);
+    const proxyContract = await deployProxyContract(helper, deployer);
+    const realContractV1 = await deployRealContractV1(helper, deployer);
+    await proxyContract.methods.updateVersion(realContractV1.options.address).send();
+    await proxyContract.methods.flip().send();
+    await proxyContract.methods.flip().send();
+    await proxyContract.methods.flip().send();
+    const value1 = await proxyContract.methods.getValue().call();
+    const flipCount1 = await proxyContract.methods.getFlipCount().call();
+    expect(value1).to.be.equal(true);
+    expect(flipCount1).to.be.equal('3');
+    const realContractV2 = await deployRealContractV2(helper, deployer);
+    await proxyContract.methods.updateVersion(realContractV2.options.address).send();
+    await proxyContract.methods.flip().send();
+    await proxyContract.methods.flip().send();
+    const value2 = await proxyContract.methods.getValue().call();
+    const flipCount2 = await proxyContract.methods.getFlipCount().call();
+    expect(value2).to.be.equal(true);
+    expect(flipCount2).to.be.equal('1');
+  });
+
+  async function deployProxyContract(helper: EthUniqueHelper, deployer: string) {
+    return await helper.ethContract.deployByCode(deployer, 'ProxyContract', `
+      // SPDX-License-Identifier: UNLICENSED
+      pragma solidity ^0.8.6;
+      
+      contract ProxyContract {
+        address realContract;
+        event NewEvent(uint data);
+        receive() external payable {}
+        constructor() {}
+        function updateVersion(address newContractAddress) external {
+          realContract = newContractAddress;
+        }
+        function flip() external {
+          RealContract(realContract).flip();
+        }
+        function getValue() external view returns (bool) {
+          return RealContract(realContract).getValue();
+        }
+        function getFlipCount() external view returns (uint) {
+            return RealContract(realContract).getFlipCount();
+        }
+      }
+      
+      interface RealContract {
+        function flip() external;
+        function getValue() external view returns (bool);
+        function getFlipCount() external view returns (uint);
+      }`);
+  }
+
+  async function deployRealContractV1(helper: EthUniqueHelper, deployer: string) {
+    return await helper.ethContract.deployByCode(deployer, 'RealContractV1', `
+      // SPDX-License-Identifier: UNLICENSED
+      pragma solidity ^0.8.6;
+  
+      contract RealContractV1 {
+        bool value = false;
+        uint flipCount = 0;
+        function flip() external {
+          value = !value;
+          flipCount++;
+        }
+        function getValue() external view returns (bool) {
+          return value;
+        }
+        function getFlipCount() external view returns (uint) {
+          return flipCount;
+        }
+      }`);
+  }
+
+  async function deployRealContractV2(helper: EthUniqueHelper, deployer: string) {
+    return await helper.ethContract.deployByCode(deployer, 'RealContractV2', `
+      // SPDX-License-Identifier: UNLICENSED
+      pragma solidity ^0.8.6;
+  
+      contract RealContractV2 {
+        bool value = false;
+        uint flipCount = 10;
+        function flip() external {
+          value = !value;
+          flipCount--;
+        }
+        function getValue() external view returns (bool) {
+          return value;
+        }
+        function getFlipCount() external view returns (uint) {
+          return flipCount;
+        }
+      }`);
+  }
+});
\ No newline at end of file
--- a/tests/src/eth/util/playgrounds/unique.dev.ts
+++ b/tests/src/eth/util/playgrounds/unique.dev.ts
@@ -71,7 +71,6 @@
         },
       },
     }), {import: await this.findImports(imports)})).contracts[`${name}.sol`][name];
-  
     return {
       abi: out.abi,
       object: '0x' + out.evm.bytecode.object,