diff --git a/script/DeployContracts.s.sol b/script/DeployContracts.s.sol
index 91b7bf2..4bb41cb 100644
--- a/script/DeployContracts.s.sol
+++ b/script/DeployContracts.s.sol
@@ -182,6 +182,13 @@ contract DeployContracts is Script {
         utilityToken.grantRole(utilityToken.BURNER_ROLE(), address(votingPowerExchange));
         // give defender the exchanger role
         votingPowerExchange.grantRole(votingPowerExchange.EXCHANGER_ROLE(), defender);
+
+        // give exchanger some utility token
+        utilityToken.mint(exchanger, 10_000 * 1e18);
+        // exchanger should approve the votingPowerExchange to spend the utility token
+        // here exchanger is deployer so we do this directly
+        // change this method when exchanger is not deployer
+        utilityToken.approve(address(votingPowerExchange), 10_000 * 1e18);
         vm.stopBroadcast();
 
         return DeploymentResult({
diff --git a/test/fuzz/FuzzVotingPowerExchange.t.sol b/test/fuzz/FuzzVotingPowerExchange.t.sol
index c51f81b..712aa43 100644
--- a/test/fuzz/FuzzVotingPowerExchange.t.sol
+++ b/test/fuzz/FuzzVotingPowerExchange.t.sol
@@ -123,7 +123,6 @@ contract VotingPwoerExchangeTest is Test {
     }
 
     function testExchangeWithAnyAmountWhichIsInRangeWillSucceed(uint256 amount) public {
-
         // mint 75240 utility token to the exchanger
         vm.startPrank(minter);
         utilityToken.mint(exchanger, 75240 * 1e18);
diff --git a/test/integration/VotingPowerExchange.t.sol b/test/integration/VotingPowerExchange.t.sol
index 73fd2d9..212267e 100644
--- a/test/integration/VotingPowerExchange.t.sol
+++ b/test/integration/VotingPowerExchange.t.sol
@@ -491,7 +491,7 @@ contract VotingPowerExchangeTest is Test {
         vm.prank(minter);
         // exchanger has already got 10_000 utility token
         utilityToken.mint(exchanger, 65_300 * 1e18);
-        // approve 
+        // approve
         vm.startPrank(exchanger);
         utilityToken.approve(address(votingPowerExchange), 75_300 * 1e18);