diff --git a/.changeset/tidy-pans-camp.md b/.changeset/tidy-pans-camp.md
new file mode 100644
index 00000000..d879c885
--- /dev/null
+++ b/.changeset/tidy-pans-camp.md
@@ -0,0 +1,5 @@
+---
+"@cartesi/rollups": minor
+---
+
+Add `IAuthority` interface
diff --git a/contracts/consensus/authority/Authority.sol b/contracts/consensus/authority/Authority.sol
index ab8fccb0..a4518e00 100644
--- a/contracts/consensus/authority/Authority.sol
+++ b/contracts/consensus/authority/Authority.sol
@@ -5,13 +5,15 @@ pragma solidity ^0.8.8;
 
 import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
 
+import {IAuthority} from "./IAuthority.sol";
 import {IConsensus} from "../IConsensus.sol";
 import {AbstractConsensus} from "../AbstractConsensus.sol";
+import {IOwnable} from "../../access/IOwnable.sol";
 
 /// @notice A consensus contract controlled by a single address, the owner.
 /// @dev This contract inherits from OpenZeppelin's `Ownable` contract.
 ///      For more information on `Ownable`, please consult OpenZeppelin's official documentation.
-contract Authority is AbstractConsensus, Ownable {
+contract Authority is IAuthority, AbstractConsensus, Ownable {
     /// @param initialOwner The initial contract owner
     /// @param epochLength The epoch length
     /// @dev Reverts if the epoch length is zero.
@@ -30,7 +32,7 @@ contract Authority is AbstractConsensus, Ownable {
         address appContract,
         uint256 lastProcessedBlockNumber,
         bytes32 claim
-    ) external onlyOwner {
+    ) external override onlyOwner {
         emit ClaimSubmission(
             msg.sender,
             appContract,
@@ -39,4 +41,18 @@ contract Authority is AbstractConsensus, Ownable {
         );
         _acceptClaim(appContract, lastProcessedBlockNumber, claim);
     }
+
+    function owner() public view override(IOwnable, Ownable) returns (address) {
+        return super.owner();
+    }
+
+    function renounceOwnership() public override(IOwnable, Ownable) {
+        super.renounceOwnership();
+    }
+
+    function transferOwnership(
+        address newOwner
+    ) public override(IOwnable, Ownable) {
+        super.transferOwnership(newOwner);
+    }
 }
diff --git a/contracts/consensus/authority/IAuthority.sol b/contracts/consensus/authority/IAuthority.sol
new file mode 100644
index 00000000..f2843860
--- /dev/null
+++ b/contracts/consensus/authority/IAuthority.sol
@@ -0,0 +1,10 @@
+// (c) Cartesi and individual authors (see AUTHORS)
+// SPDX-License-Identifier: Apache-2.0 (see LICENSE)
+
+pragma solidity ^0.8.8;
+
+import {IOwnable} from "../../access/IOwnable.sol";
+import {IConsensus} from "../IConsensus.sol";
+
+/// @notice A consensus contract controlled by a single address, the owner.
+interface IAuthority is IConsensus, IOwnable {}
diff --git a/test/foundry/consensus/authority/Authority.t.sol b/test/foundry/consensus/authority/Authority.t.sol
index 16aec45c..62ba9beb 100644
--- a/test/foundry/consensus/authority/Authority.t.sol
+++ b/test/foundry/consensus/authority/Authority.t.sol
@@ -8,21 +8,34 @@ import {Vm} from "forge-std/Vm.sol";
 import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
 
 import {Authority} from "contracts/consensus/authority/Authority.sol";
+import {IAuthority} from "contracts/consensus/authority/IAuthority.sol";
 import {IConsensus} from "contracts/consensus/IConsensus.sol";
+import {IOwnable} from "contracts/access/IOwnable.sol";
 
 import {TestBase} from "../../util/TestBase.sol";
 import {LibTopic} from "../../util/LibTopic.sol";
+import {OwnableTest} from "../../util/OwnableTest.sol";
 
-contract AuthorityTest is TestBase {
+contract AuthorityTest is TestBase, OwnableTest {
     using LibTopic for address;
 
+    IAuthority _authority;
+
+    function setUp() external {
+        _authority = new Authority(vm.addr(1), 1);
+    }
+
+    function _getOwnableContract() internal view override returns (IOwnable) {
+        return _authority;
+    }
+
     function testConstructor(address owner, uint256 epochLength) public {
         vm.assume(owner != address(0));
         vm.assume(epochLength > 0);
 
         vm.recordLogs();
 
-        Authority authority = new Authority(owner, epochLength);
+        IAuthority authority = new Authority(owner, epochLength);
 
         Vm.Log[] memory entries = vm.getRecordedLogs();
 
@@ -80,7 +93,7 @@ contract AuthorityTest is TestBase {
         vm.assume(owner != notOwner);
         vm.assume(epochLength > 0);
 
-        Authority authority = new Authority(owner, epochLength);
+        IAuthority authority = new Authority(owner, epochLength);
 
         vm.expectRevert(
             abi.encodeWithSelector(
@@ -103,7 +116,7 @@ contract AuthorityTest is TestBase {
         vm.assume(owner != address(0));
         vm.assume(epochLength > 0);
 
-        Authority authority = new Authority(owner, epochLength);
+        IAuthority authority = new Authority(owner, epochLength);
 
         _expectClaimEvents(
             authority,
@@ -128,13 +141,13 @@ contract AuthorityTest is TestBase {
         vm.assume(owner != address(0));
         vm.assume(epochLength > 0);
 
-        Authority authority = new Authority(owner, epochLength);
+        IAuthority authority = new Authority(owner, epochLength);
 
         assertFalse(authority.wasClaimAccepted(appContract, claim));
     }
 
     function _expectClaimEvents(
-        Authority authority,
+        IAuthority authority,
         address owner,
         address appContract,
         uint256 lastProcessedBlockNumber,