diff --git a/internal/consensus/mempool_test.go b/internal/consensus/mempool_test.go
index aef670b38..6ef3849ad 100644
--- a/internal/consensus/mempool_test.go
+++ b/internal/consensus/mempool_test.go
@@ -266,7 +266,6 @@ type CounterApplication struct {
 
 	txCount        int
 	mempoolTxCount int
-	lastTx         int
 	mu             sync.Mutex
 }