diff --git a/test/mocks/MockCombination.sol b/test/mocks/MockCombination.sol
new file mode 100644
index 0000000..1132d3d
--- /dev/null
+++ b/test/mocks/MockCombination.sol
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.0;
+
+import "src/external/IExternalResolver.sol";
+import "src/external/IExternalSchemaValidator.sol";
+import { IRegistry, SchemaUID, AttestationRequest } from "src/IRegistry.sol";
+
+contract MockCombination is IExternalResolver, IExternalSchemaValidator {
+    bool immutable returnVal;
+
+    event AttestationCalled();
+    event RevokeCalled();
+    event ModuleCalled();
+
+    constructor(bool ret) {
+        returnVal = ret;
+    }
+
+    /*//////////////////////////////////////////////////////////////////////////
+                                     RESOLVER
+    //////////////////////////////////////////////////////////////////////////*/
+
+    function supportsInterface(bytes4 interfaceId) public pure override returns (bool) {
+        if (interfaceId == type(IExternalResolver).interfaceId || interfaceId == type(IExternalSchemaValidator).interfaceId) return true;
+    }
+
+    function resolveAttestation(AttestationRecord calldata attestation) external payable override returns (bool) {
+        emit AttestationCalled();
+        return returnVal;
+    }
+
+    function resolveAttestation(AttestationRecord[] calldata attestation) external payable override returns (bool) {
+        emit AttestationCalled();
+        return returnVal;
+    }
+
+    function resolveRevocation(AttestationRecord calldata attestation) external payable override returns (bool) {
+        emit RevokeCalled();
+        return returnVal;
+    }
+
+    function resolveRevocation(AttestationRecord[] calldata attestation) external payable override returns (bool) {
+        emit RevokeCalled();
+        return returnVal;
+    }
+
+    function resolveModuleRegistration(
+        address sender,
+        address moduleRecord,
+        ModuleRecord calldata record,
+        bytes calldata resolverContext
+    )
+        external
+        payable
+        override
+        returns (bool)
+    {
+        emit ModuleCalled();
+        return returnVal;
+    }
+
+    /*//////////////////////////////////////////////////////////////////////////
+                                SCHEMA VALIDATOR
+    //////////////////////////////////////////////////////////////////////////*/
+
+    function validateSchema(AttestationRecord calldata attestation) external view override returns (bool) {
+        return returnVal;
+    }
+
+    function validateSchema(AttestationRecord[] calldata attestations) external view override returns (bool) {
+        return returnVal;
+    }
+
+    /*//////////////////////////////////////////////////////////////////////////
+                                MOCK ATTESTER
+    //////////////////////////////////////////////////////////////////////////*/
+
+    function attest(IRegistry registry, SchemaUID schemaUID, AttestationRequest calldata request) external payable returns (bool) {
+        registry.attest(schemaUID, request);
+    }
+}