diff --git a/src/interfaces/IEngine.sol b/src/interfaces/external/IEngine.sol
similarity index 100%
rename from src/interfaces/IEngine.sol
rename to src/interfaces/external/IEngine.sol
diff --git a/test/utils/MockAccount.sol b/test/utils/MockAccount.sol
index 8911e71..f8bf802 100644
--- a/test/utils/MockAccount.sol
+++ b/test/utils/MockAccount.sol
@@ -7,7 +7,7 @@ import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
 import "@openzeppelin/contracts/utils/Create2.sol";
 import {IERC721Receiver} from "lib/openzeppelin-contracts/contracts/token/ERC721/IERC721Receiver.sol";
 import {IPerpsMarketProxy} from "src/interfaces/external/IPerpsMarketProxy.sol";
-import {IEngine} from "src/interfaces/IEngine.sol";
+import {IEngine} from "src/interfaces/external/IEngine.sol";
 import {IERC20} from "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
 import {console} from "forge-std/console.sol";