diff --git a/STATE.md b/STATE.md
index ca0e598..12221bb 100644
--- a/STATE.md
+++ b/STATE.md
@@ -36,3 +36,4 @@
 - [2026-03-14] remove MAX_ANCHOR_WIDTH clamp in ThreePositionStrategy (#783)
 - [2026-03-14] increase CALCULATE_PARAMS_GAS_LIMIT from 200k to 500k (#782)
 - [2026-03-15] add evolution run 8 champion to seed pool (#781)
+- [2026-03-15] fix FitnessEvaluator.t.sol broken on Base mainnet fork (#780)
diff --git a/onchain/test/FitnessEvaluator.t.sol b/onchain/test/FitnessEvaluator.t.sol
index 1b30c55..755c44d 100644
--- a/onchain/test/FitnessEvaluator.t.sol
+++ b/onchain/test/FitnessEvaluator.t.sol
@@ -138,12 +138,17 @@ contract FitnessEvaluator is Test {
 
     uint24 internal constant POOL_FEE = 10_000;
     address internal constant WETH_ADDR = 0x4200000000000000000000000000000000000006;
-    address internal constant SWAP_ROUTER = 0x94cC0AaC535CCDB3C01d6787D6413C739ae12bc4;
-    // Base mainnet NonfungiblePositionManager — https://basescan.org/address/0x03a520B32c04bf3beef7BEb72E919cF822Ed34F3
-    address internal constant NPM_ADDR = 0x03a520B32c04bf3beef7BEb72E919cF822Ed34F3;
-    // Base mainnet Uniswap V3 Factory — https://basescan.org/address/0x4752ba5DBc23f44D87826276BF6Fd6b1C372aD24
-    address internal constant V3_FACTORY = 0x4752ba5DBc23f44D87826276BF6Fd6b1C372aD24;
-    address internal constant FEE_DEST = 0xf6a3eef9088A255c32b6aD2025f83E57291D9011;
+    address internal constant SWAP_ROUTER = 0x2626664c2603336E57B271c5C0b26F421741e481;
+    // Base mainnet NonfungiblePositionManager — https://basescan.org/address/0x03a520b32C04BF3bEEf7BEb72E919cf822Ed34f1
+    address internal constant NPM_ADDR = 0x03a520b32C04BF3bEEf7BEb72E919cf822Ed34f1;
+    // Base mainnet Uniswap V3 Factory — https://basescan.org/address/0x33128a8fC17869897dcE68Ed026d694621f6FDfD
+    address internal constant V3_FACTORY = 0x33128a8fC17869897dcE68Ed026d694621f6FDfD;
+    /// @dev Intentionally differs from DeployBaseMainnet.sol (0xf6a3...D9011).
+    ///      On a Base mainnet fork that address already has contract bytecode, which
+    ///      causes LiquidityManager.setFeeDestination() to set feeDestinationLocked=true
+    ///      and subsequently revert if called again during snapshot/revert cycles.
+    ///      This keccak-derived address is a guaranteed EOA on any live network.
+    address internal constant FEE_DEST = 0x8A9145E1Ea4C4d7FB08cF1011c8ac1F0e10F9383;
 
     /// @dev Fixed address used with vm.etch to inject candidate bytecode.
     ///      Chosen to be deterministic and not collide with real Base addresses.
@@ -230,6 +235,10 @@ contract FitnessEvaluator is Test {
             string memory candidateId = vm.readLine(idsFile);
             string memory bytecodeHex = vm.readLine(bytecodesFile);
             if (bytes(candidateId).length == 0) break;
+            if (bytes(bytecodeHex).length == 0) {
+                console.log("FitnessEvaluator: bytecodes.txt EOF before ids.txt - pipeline mismatch, stopping");
+                break;
+            }
 
             // Revert to clean post-deploy state for each candidate.
             vm.revertTo(baseSnap);
@@ -401,7 +410,10 @@ contract FitnessEvaluator is Test {
         //    candidate score identically (all lm_eth_total = free WETH only, no positions).
         bool recentered = false;
         for (uint256 _attempt = 0; _attempt < 5; _attempt++) {
-            if (_attempt > 0) vm.roll(block.number + 50);
+            if (_attempt > 0) {
+                vm.roll(block.number + 50);
+                vm.warp(block.timestamp + 600);
+            }
             vm.prank(recenterAddr);
             try ILM(lmAddr).recenter() returns (bool) {
                 recentered = true;