diff --git a/contracts/test/UnitTestSFC.sol b/contracts/test/UnitTestSFC.sol
index 48caa37..e584809 100644
--- a/contracts/test/UnitTestSFC.sol
+++ b/contracts/test/UnitTestSFC.sol
@@ -271,8 +271,6 @@ interface SFCUnitTestI {
 
     function advanceTime(uint256) external;
 
-    function highestLockupEpoch(address, uint256) external view returns (uint256);
-
     function enableNonNodeCalls() external;
 
     function disableNonNodeCalls() external;