diff --git a/test/SpokePoolClient.fills.ts b/test/SpokePoolClient.fills.ts
index caa6a339d..de5885c90 100644
--- a/test/SpokePoolClient.fills.ts
+++ b/test/SpokePoolClient.fills.ts
@@ -170,14 +170,13 @@ describe("SpokePoolClient: Fills", function () {
     expect(fillBlock).to.be.undefined;
 
     await buildFill(spokePool, destErc20, depositor, relayer1, deposit, 1);
-    const lateBlockNumber = await spokePool.provider.getBlockNumber();
-    await hre.network.provider.send("evm_mine");
     await hre.network.provider.send("evm_mine");
+    const lateBlockNumber = await spokePool.provider.getBlockNumber();
 
     // Now search for the fill _after_ it was filled and expect an exception.
     const [srcChain, dstChain] = [getNetworkName(deposit.originChainId), getNetworkName(deposit.destinationChainId)];
     await assertPromiseError(
-      findFillBlock(spokePool, deposit as RelayData, lateBlockNumber + 1),
+      findFillBlock(spokePool, deposit as RelayData, lateBlockNumber),
       `${srcChain} deposit ${deposit.depositId} filled on ${dstChain} before block`
     );
   });