we actually need those.

contracts/test/utils/DistributableTest.sol

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import { Distributable } from '../../utils/Distributable.sol';
+
+contract DistributableTest is Distributable {
+    uint256 public nonce;
+
+    constructor(address distributor) {
+        _addDistributor(distributor);
+    }
+
+    function testDistributable() external onlyRole(uint8(Roles.DISTRIBUTOR)) {
+        nonce++;
+    }
+
+    function getDistributorRole() external pure returns (uint8) {
+        return uint8(Roles.DISTRIBUTOR);
+    }
+}

contracts/test/utils/OperatableTest.sol

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import { Operatable } from '../../utils/Operatable.sol';
+
+contract OperatorableTest is Operatable {
+    uint256 public nonce;
+
+    constructor(address operator) {
+        _addOperator(operator);
+    }
+
+    function testOperatorable() external onlyRole(uint8(Roles.OPERATOR)) {
+        nonce++;
+    }
+
+    function getOperatorRole() external pure returns (uint8) {
+        return uint8(Roles.OPERATOR);
+    }
+}