diff --git a/contracts/dapp/Application.sol b/contracts/dapp/Application.sol
index cb93cc6a..dbec63b0 100644
--- a/contracts/dapp/Application.sol
+++ b/contracts/dapp/Application.sol
@@ -143,12 +143,7 @@ contract Application is
         return _consensus;
     }
 
-    function getDataAvailability()
-        external
-        view
-        override
-        returns (IERC165)
-    {
+    function getDataAvailability() external view override returns (IERC165) {
         return _dataAvailability;
     }
 
diff --git a/contracts/inputs/InputBox.sol b/contracts/inputs/InputBox.sol
index e170c4c0..fec46d6b 100644
--- a/contracts/inputs/InputBox.sol
+++ b/contracts/inputs/InputBox.sol
@@ -3,11 +3,13 @@
 
 pragma solidity ^0.8.18;
 
+import {ERC165} from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
+
 import {IInputBox} from "./IInputBox.sol";
 import {CanonicalMachine} from "../common/CanonicalMachine.sol";
 import {Inputs} from "../common/Inputs.sol";
 
-contract InputBox is IInputBox {
+contract InputBox is IInputBox, ERC165 {
     /// @notice Deployment block number
     uint256 immutable _deploymentBlockNumber;
 
@@ -82,4 +84,12 @@ contract InputBox is IInputBox {
     {
         return _deploymentBlockNumber;
     }
+
+    function supportsInterface(
+        bytes4 interfaceId
+    ) public view override returns (bool) {
+        return
+            interfaceId == type(IInputBox).interfaceId ||
+            super.supportsInterface(interfaceId);
+    }
 }
diff --git a/test/dapp/Application.t.sol b/test/dapp/Application.t.sol
index 173e2c68..5e1d7a0b 100644
--- a/test/dapp/Application.t.sol
+++ b/test/dapp/Application.t.sol
@@ -95,7 +95,12 @@ contract ApplicationTest is TestBase, OwnableTest {
                 address(0)
             )
         );
-        new Application(_consensus, address(0), _templateHash, IERC165(address(0)));
+        new Application(
+            _consensus,
+            address(0),
+            _templateHash,
+            IERC165(address(0))
+        );
     }
 
     function testConstructor(
@@ -119,7 +124,10 @@ contract ApplicationTest is TestBase, OwnableTest {
         assertEq(address(appContract.getConsensus()), address(consensus));
         assertEq(appContract.owner(), owner);
         assertEq(appContract.getTemplateHash(), templateHash);
-        assertEq(address(appContract.getDataAvailability()), address(dataAvailability));
+        assertEq(
+            address(appContract.getDataAvailability()),
+            address(dataAvailability)
+        );
     }
 
     // -------------------
diff --git a/test/dapp/ApplicationFactory.t.sol b/test/dapp/ApplicationFactory.t.sol
index c3b533ab..63f6ce28 100644
--- a/test/dapp/ApplicationFactory.t.sol
+++ b/test/dapp/ApplicationFactory.t.sol
@@ -37,7 +37,10 @@ contract ApplicationFactoryTest is TestBase {
         assertEq(address(appContract.getConsensus()), address(consensus));
         assertEq(appContract.owner(), appOwner);
         assertEq(appContract.getTemplateHash(), templateHash);
-        assertEq(address(appContract.getDataAvailability()), address(dataAvailability));
+        assertEq(
+            address(appContract.getDataAvailability()),
+            address(dataAvailability)
+        );
     }
 
     function testNewApplicationDeterministic(
@@ -71,7 +74,10 @@ contract ApplicationFactoryTest is TestBase {
         assertEq(address(appContract.getConsensus()), address(consensus));
         assertEq(appContract.owner(), appOwner);
         assertEq(appContract.getTemplateHash(), templateHash);
-        assertEq(address(appContract.getDataAvailability()), address(dataAvailability));
+        assertEq(
+            address(appContract.getDataAvailability()),
+            address(dataAvailability)
+        );
 
         precalculatedAddress = _factory.calculateApplicationAddress(
             consensus,
diff --git a/test/dapp/SelfHostedApplicationFactory.t.sol b/test/dapp/SelfHostedApplicationFactory.t.sol
index 93f4e401..4147a828 100644
--- a/test/dapp/SelfHostedApplicationFactory.t.sol
+++ b/test/dapp/SelfHostedApplicationFactory.t.sol
@@ -164,6 +164,9 @@ contract SelfHostedApplicationFactoryTest is TestBase {
         assertEq(address(application.getConsensus()), authorityAddr);
         assertEq(application.owner(), appOwner);
         assertEq(application.getTemplateHash(), templateHash);
-        assertEq(address(application.getDataAvailability()), address(dataAvailability));
+        assertEq(
+            address(application.getDataAvailability()),
+            address(dataAvailability)
+        );
     }
 }
diff --git a/test/inputs/InputBox.t.sol b/test/inputs/InputBox.t.sol
index 4c56ffeb..0d30501d 100644
--- a/test/inputs/InputBox.t.sol
+++ b/test/inputs/InputBox.t.sol
@@ -3,6 +3,8 @@
 
 pragma solidity ^0.8.22;
 
+import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
+
 import {Test} from "forge-std/Test.sol";
 import {InputBox} from "contracts/inputs/InputBox.sol";
 import {IInputBox} from "contracts/inputs/IInputBox.sol";
@@ -24,6 +26,21 @@ contract InputBoxTest is Test {
         assertEq(_inputBox.getDeploymentBlockNumber(), blockNumber);
     }
 
+    function testSupportsInterface() external view {
+        assertEq(
+            _inputBox.supportsInterface(type(IInputBox).interfaceId),
+            true
+        );
+        assertEq(_inputBox.supportsInterface(type(IERC165).interfaceId), true);
+        assertEq(_inputBox.supportsInterface(bytes4(0xffffffff)), false);
+    }
+
+    function testSupportsInterface(bytes4 interfaceId) external view {
+        vm.assume(interfaceId != type(IInputBox).interfaceId);
+        vm.assume(interfaceId != type(IERC165).interfaceId);
+        assertEq(_inputBox.supportsInterface(interfaceId), false);
+    }
+
     function testNoInputs(address appContract) public view {
         assertEq(_inputBox.getNumberOfInputs(appContract), 0);
     }