diff --git a/packages/plugin-hardhat/test/transparent-admin-initial-owner.js b/packages/plugin-hardhat/test/transparent-admin-initial-owner.js
index ad6c173bf..7d9751bcb 100644
--- a/packages/plugin-hardhat/test/transparent-admin-initial-owner.js
+++ b/packages/plugin-hardhat/test/transparent-admin-initial-owner.js
@@ -3,6 +3,8 @@ const test = require('ava');
 const { ethers, upgrades } = require('hardhat');
 const hre = require('hardhat');
 
+const OWNABLE_ABI = ['function owner() view returns (address)'];
+
 test.before(async t => {
   t.context.Greeter = await ethers.getContractFactory('Greeter');
 });
@@ -12,7 +14,7 @@ test('initial owner using default signer', async t => {
 
   const proxy = await upgrades.deployProxy(Greeter, ['hello']);
   const adminAddress = await upgrades.erc1967.getAdminAddress(await proxy.getAddress());
-  const admin = await hre.ethers.getContractAt(['function owner() view returns (address)'], adminAddress);
+  const admin = await hre.ethers.getContractAt(OWNABLE_ABI, adminAddress);
 
   const defaultSigner = await ethers.provider.getSigner(0);
 
@@ -26,7 +28,7 @@ test('initial owner using custom signer', async t => {
 
   const proxy = await upgrades.deployProxy(Greeter, ['hello']);
   const adminAddress = await upgrades.erc1967.getAdminAddress(await proxy.getAddress());
-  const admin = await hre.ethers.getContractAt(['function owner() view returns (address)'], adminAddress);
+  const admin = await hre.ethers.getContractAt(OWNABLE_ABI, adminAddress);
 
   t.is(await admin.owner(), customSigner.address);
 });
@@ -38,7 +40,7 @@ test('initial owner using initialOwner option', async t => {
 
   const proxy = await upgrades.deployProxy(Greeter, ['hello'], { initialOwner: initialOwner.address });
   const adminAddress = await upgrades.erc1967.getAdminAddress(await proxy.getAddress());
-  const admin = await hre.ethers.getContractAt(['function owner() view returns (address)'], adminAddress);
+  const admin = await hre.ethers.getContractAt(OWNABLE_ABI, adminAddress);
 
   t.is(await admin.owner(), initialOwner.address);
 });
@@ -56,7 +58,7 @@ test('initial owner - no signer in ContractFactory', async t => {
 
   const proxy = await upgrades.deployProxy(Greeter, ['hello'], { initialOwner: initialOwner.address });
   const adminAddress = await upgrades.erc1967.getAdminAddress(await proxy.getAddress());
-  const admin = await hre.ethers.getContractAt(['function owner() view returns (address)'], adminAddress);
+  const admin = await hre.ethers.getContractAt(OWNABLE_ABI, adminAddress);
 
   t.is(await admin.owner(), initialOwner.address);
 });
diff --git a/packages/plugin-hardhat/test/transparent-transfer-admin-ownership-happy-path.js b/packages/plugin-hardhat/test/transparent-transfer-admin-ownership-happy-path.js
index 5682345d9..185e6f9fa 100644
--- a/packages/plugin-hardhat/test/transparent-transfer-admin-ownership-happy-path.js
+++ b/packages/plugin-hardhat/test/transparent-transfer-admin-ownership-happy-path.js
@@ -2,7 +2,9 @@ const test = require('ava');
 
 const hre = require('hardhat');
 const { ethers, upgrades } = hre;
-const testAddress = '0x1E6876a6C2757de611c9F12B23211dBaBd1C9028';
+
+const TEST_ADDRESS = '0x1E6876a6C2757de611c9F12B23211dBaBd1C9028';
+const OWNABLE_ABI = ['function owner() view returns (address)'];
 
 test.before(async t => {
   t.context.Greeter = await ethers.getContractFactory('Greeter');
@@ -13,11 +15,11 @@ test('transferProxyAdminOwnership', async t => {
   const { Greeter } = t.context;
   const greeter = await upgrades.deployProxy(Greeter, ['Hello, Hardhat!'], { kind: 'transparent' });
 
-  await upgrades.admin.transferProxyAdminOwnership(await greeter.getAddress(), testAddress);
+  await upgrades.admin.transferProxyAdminOwnership(await greeter.getAddress(), TEST_ADDRESS);
 
   const adminAddress = await upgrades.erc1967.getAdminAddress(await greeter.getAddress());
-  const admin = await hre.ethers.getContractAt(['function owner() view returns (address)'], adminAddress);
+  const admin = await hre.ethers.getContractAt(OWNABLE_ABI, adminAddress);
   const newOwner = await admin.owner();
 
-  t.is(newOwner, testAddress);
+  t.is(newOwner, TEST_ADDRESS);
 });
diff --git a/packages/plugin-hardhat/test/transparent-transfer-admin-ownership-signer.js b/packages/plugin-hardhat/test/transparent-transfer-admin-ownership-signer.js
index c52a3a3a8..b50015801 100644
--- a/packages/plugin-hardhat/test/transparent-transfer-admin-ownership-signer.js
+++ b/packages/plugin-hardhat/test/transparent-transfer-admin-ownership-signer.js
@@ -2,7 +2,9 @@ const test = require('ava');
 
 const hre = require('hardhat');
 const { ethers, upgrades } = hre;
-const testAddress = '0x1E6876a6C2757de611c9F12B23211dBaBd1C9028';
+
+const TEST_ADDRESS = '0x1E6876a6C2757de611c9F12B23211dBaBd1C9028';
+const OWNABLE_ABI = ['function owner() view returns (address)'];
 
 test('transferProxyAdminOwnership - signer', async t => {
   // we need to deploy a proxy so we have a Proxy Admin
@@ -10,11 +12,11 @@ test('transferProxyAdminOwnership - signer', async t => {
   const Greeter = await ethers.getContractFactory('Greeter', signer);
   const greeter = await upgrades.deployProxy(Greeter, ['Hello, Hardhat!'], { kind: 'transparent' });
 
-  await upgrades.admin.transferProxyAdminOwnership(await greeter.getAddress(), testAddress, signer);
+  await upgrades.admin.transferProxyAdminOwnership(await greeter.getAddress(), TEST_ADDRESS, signer);
 
   const adminAddress = await upgrades.erc1967.getAdminAddress(await greeter.getAddress());
-  const admin = await hre.ethers.getContractAt(['function owner() view returns (address)'], adminAddress);
+  const admin = await hre.ethers.getContractAt(OWNABLE_ABI, adminAddress);
   const newOwner = await admin.owner();
 
-  t.is(newOwner, testAddress);
+  t.is(newOwner, TEST_ADDRESS);
 });