diff --git a/test/DefaultInflationManager.t.sol b/test/DefaultInflationManager.t.sol
index 6ee6cf1..47c3848 100644
--- a/test/DefaultInflationManager.t.sol
+++ b/test/DefaultInflationManager.t.sol
@@ -71,7 +71,7 @@ contract DefaultInflationManagerTest is Test {
         assertEq(polygon.totalSupply(), 10_000_000_000e18);
     }
 
-    function test_InvalidDeployment(uint256 seed) external {
+    function test_InvalidDeployment(uint160 seed) external {
         address[5] memory params = [
             makeAddr("polygon"),
             makeAddr("migration"),
@@ -79,11 +79,17 @@ contract DefaultInflationManagerTest is Test {
             makeAddr("treasury"),
             makeAddr("governance")
         ];
-        params[seed % params.length] = address(0); // any one is zero addr
 
         address proxy = address(
             new TransparentUpgradeableProxy(address(new DefaultInflationManager()), msg.sender, "")
         );
+
+        vm.prank(address(seed));
+        vm.expectRevert("ONLY_DEPLOYER");
+        DefaultInflationManager(proxy).initialize(params[0], params[1], params[2], params[3], params[4]);
+
+        params[seed % params.length] = address(0); // any one is zero addr
+
         vm.expectRevert(InvalidAddress.selector);
         DefaultInflationManager(proxy).initialize(params[0], params[1], params[2], params[3], params[4]);
     }